Birds are the only animals with feathers, although some other animals, such as insects and bats, also have wings．Nearly all birds can fly, and even flightless birds, such as ostriches （鸵鸟）, penguins, evolved from flying ancestors．

Birds are found worldwide in many habitats．They can fly over some of the highest mountains on earth as well as both of the earth’s poles, dive through water to depths of more than 250m, and occupy habitats with the most extreme climates on the planet, including arctic tundra （冻土地带） and the Sahara Desert．Certain kinds of seabirds are commonly seen over the open ocean thousands of kilometers from the nearest land, but all birds must come ashore to raise their young．

Highly developed animals, birds are sensitive and responsive, colorful and graceful, with habits that excite interest and inquiry．People have long been fascinated by birds, in part because birds are found in the same habitats in which humans live．And like people, most species of birds are active during daylight hours．Humans find inspiration in birds’ capacity for flight and in their musical calls．Humans also find birds useful---their flesh and eggs for food, their feathers for warmth, and their companionship．Perhaps a key basis for our friendliness with birds is the similarity of our sensory worlds: Both birds and humans rely more heavily on hearing and color vision than on smell．Birds are useful indicators of the quality of the environment, because the health of bird populations mirrors the health of our environment．The rapid decline in birds populations and the accelerating extinction rates of birds in the world’s forests, grassland, wetlands, and islands are therefore reasons for great concern．

1.Which of the following would be the best title of the text?

A．Animals with Feathers and Wings

Our friendliness with birds

C．An introduction to Birds

D．Bird’s life

2.What does the second paragraph mainly tell us ?

A．Bird’s friendship              Bird’s habitats

C．Bird’s raising                 D．Bird’s environment

3.Which of following is NOT true according to the passage ?

A．Bird’s flying abilities and musical calls inspire humans greatly．

Birds live in the same surroundings in which humans live．

C．Both birds and humans rely more heavily on hearing and smell than on color vision．

D．Bird’s flesh and eggs for food, bird’s feathers for warmth, and their companionship are useful to us．

4.From the text it may imply but NOT state that __________．

A．the environment is being damaged seriously

if you want to raise birds, you should pay attention to environment

C．the environment affects the human beings

D．bird populations decrease rapidly

D
Both warm-blooded and cold-blooded desert animals have ways to escape the desert heat. Warm-blooded desert animals, such as rats and mice, rest during the day, often staying in cool underground burrows. At night they search for food. Animals that are out during the day, such as cold-blooded lizards and snakes, are active only for short periods. As their body temperature rises, these reptiles move into the shade in order to cool down. In the early evening, when the sun grows weaker, the reptiles become more active and begin their search for food again.
Getting enough water to survive is a major problem for all desert animals. Some desert animals, such as the kangaroo rat and the related jerboa, get water only from the food that they eat. Because these animals eat mainly dry seeds, they must survive on a tiny amount of water.
Most deserts have only a small number of frogs and toads because these animals must be near water to survive. Yet even these creatures have adapted to desert conditions. When small amounts of water collect in temporary streams, the desert-living frogs and toads become active. After a rainfall, they lay their eggs. The eggs grow into tadpoles in a few days and into adults in just four weeks. When the puddles dry up, the adult frogs or toads dig into the ground. Their metabolism(新陈代谢) slows, and they stay beneath the ground until the next rain, which may be as good as a year away. Until then, their bodily activities continue at a reduced rate.
The camel---often called the ship of the desert---is one of the most successful desert animals. Camels can go for long periods without water, but eventually they must drink. When water becomes available to them after a long drought, they may drink 95 liters of water or more. When water is not available, what helps camels survive the desert heat is the fat stored in their humps. A camel’s hump contains about 12 kilograms of fat. Fat is rich in hydrogen. As the fat is digested, hydrogen from the fat combines with oxygen in the air that the camel breathes. The result is H2O, or water. Each kilogram of fat that a camel digests produces about a liter of water.
71. Desert animals are usually more active at night because ______.
A. it is cooler at night           B.it is easier to find water
C.they like the dark            D. they are less likely to be attacked at night
72. Which of the following desert animals can get water only from the food?
A. The camel.       B. The kangaroo rat.     C. The frog.      D. The toad
73. Which of the following is TRUE according to the passage?
A. All the desert animals rest during the day.
B. All the desert animals don’t rest during the day.
C. Cold-blooded desert animals don’t rest during the day.
D. None of the cold-blooded desert animals go out during the day.
74. The title for this passage could probably be ________.
A. Hot Deserts                         B. Desert Animals
C. How Desert Animals Get Water         D. Ways To Escape the Desert Heat
75. The underlined word “burrows” in the first paragraph can be replaced by _________.
A. holes     B. caves     C. rooms      D. Openings

Both warm-blooded and cold-blooded desert animals have ways to escape the desert heat. Warm-blooded desert animals, such as rats and mice, rest during the day, often staying in cool underground burrows. At night they search for food. Animals that are out during the day, such as cold-blooded lizards and snakes, are active only for short periods. As their body temperature rises, these reptiles move into the shade in order to cool down. In the early evening, when the sun grows weaker, the reptiles become more active and begin their search for food again.

Getting enough water to survive is a major problem for all desert animals. Some desert animals, such as the kangaroo rat and the related jerboa, get water only from the food that they eat. Because these animals eat mainly dry seeds, they must survive on a tiny amount of water.

Most deserts have only a small number of frogs and toads because these animals must be near water to survive. Yet even these creatures have adapted to desert conditions. When small amounts of water collect in temporary streams, the desert-living frogs and toads become active. After a rainfall, they lay their eggs. The eggs grow into tadpoles in a few days and into adults in just four weeks. When the puddles dry up, the adult frogs or toads dig into the ground. Their metabolism(新陈代谢) slows, and they stay beneath the ground until the next rain, which may be as good as a year away. Until then, their bodily activities continue at a reduced rate.

The camel---often called the ship of the desert---is one of the most successful desert animals. Camels can go for long periods without water, but eventually they must drink. When water becomes available to them after a long drought, they may drink 95 liters of water or more. When water is not available, what helps camels survive the desert heat is the fat stored in their humps. A camel’s hump contains about 12 kilograms of fat. Fat is rich in hydrogen. As the fat is digested, hydrogen from the fat combines with oxygen in the air that the camel breathes. The result is H2O, or water. Each kilogram of fat that a camel digests produces about a liter of water.

71. Desert animals are usually more active at night because ______.

A. it is cooler at night           B.it is easier to find water

C.they like the dark            D. they are less likely to be attacked at night

72. Which of the following desert animals can get water only from the food?

A. The camel.       B. The kangaroo rat.     C. The frog.       D. The toad

73. Which of the following is TRUE according to the passage?

A. All the desert animals rest during the day.

B. All the desert animals don’t rest during the day.

C. Cold-blooded desert animals don’t rest during the day.

D. None of the cold-blooded desert animals go out during the day.

74. The title for this passage could probably be ________.

A. Hot Deserts                         B. Desert Animals

C. How Desert Animals Get Water         D. Ways To Escape the Desert Heat

75. The underlined word “burrows” in the first paragraph can be replaced by _________.

A. holes     B. caves     C. rooms      D. openings

Both warm-blooded and cold-blooded desert animals have ways to escape the desert heat. Warm-blooded desert animals, such as rats and mice, rest during the day, often staying in cool underground burrows. At night they search for food. Animals that are out during the day, such as cold-blooded lizards and snakes, are active only for short periods. As their body temperature rises, these reptiles move into the shade in order to cool down. In the early evening, when the sun grows weaker, the reptiles become more active and begin their search for food again.

Getting enough water to survive is a major problem for all desert animals. Some desert animals, such as the kangaroo rat and the related jerboa, get water only from the food that they eat. Because these animals eat mainly dry seeds, they must survive on a tiny amount of water.

Most deserts have only a small number of frogs and toads because these animals must be near water to survive. Yet even these creatures have adapted to desert conditions. When small amounts of water collect in temporary streams, the desert-living frogs and toads become active. After a rainfall, they lay their eggs. The eggs grow into tadpoles in a few days and into adults in just four weeks. When the puddles dry up, the adult frogs or toads dig into the ground. Their metabolism(新陈代谢) slows, and they stay beneath the ground until the next rain, which may be as good as a year away. Until then, their bodily activities continue at a reduced rate.

The camel---often called the ship of the desert---is one of the most successful desert animals. Camels can go for long periods without water, but eventually they must drink. When water becomes available to them after a long drought, they may drink 95 liters of water or more. When water is not available, what helps camels survive the desert heat is the fat stored in their humps. A camel’s hump contains about 12 kilograms of fat. Fat is rich in hydrogen. As the fat is digested, hydrogen from the fat combines with oxygen in the air that the camel breathes. The result is H2O, or water. Each kilogram of fat that a camel digests produces about a liter of water.

71. Desert animals are usually more active at night because ______.

A. it is cooler at night           B.it is easier to find water

C.they like the dark            D. they are less likely to be attacked at night

72. Which of the following desert animals can get water only from the food?

A. The camel.       B. The kangaroo rat.     C. The frog.       D. The toad

73. Which of the following is TRUE according to the passage?

A. All the desert animals rest during the day.

B. All the desert animals don’t rest during the day.

C. Cold-blooded desert animals don’t rest during the day.

D. None of the cold-blooded desert animals go out during the day.

74. The title for this passage could probably be ________.

A. Hot Deserts                         B. Desert Animals

C. How Desert Animals Get Water         D. Ways To Escape the Desert Heat

75. The underlined word “burrows” in the first paragraph can be replaced by _________.

A. holes     B. caves     C. rooms      D. openings

Both warm-blooded and cold-blooded desert animals have ways to escape the desert heat. Warm-blooded desert animals, such as rats and mice, rest during the day, often staying in cool underground burrows. At night they search for food. Animals that are out during the day, such as cold-blooded lizards and snakes, are active only for short periods. As their body temperature rises, these reptiles move into the shade in order to cool down. In the early evening, when the sun grows weaker, the reptiles become more active and begin their search for food again.

Getting enough water to survive is a major problem for all desert animals. Some desert animals, such as the kangaroo rat and the related jerboa, get water only from the food that they eat. Because these animals eat mainly dry seeds, they must survive on a tiny amount of water.

Most deserts have only a small number of frogs and toads because these animals must be near water to survive. Yet even these creatures have adapted to desert conditions. When small amounts of water collect in temporary streams, the desert-living frogs and toads become active. After a rainfall, they lay their eggs. The eggs grow into tadpoles in a few days and into adults in just four weeks. When the puddles dry up, the adult frogs or toads dig into the ground. Their metabolism（新陈代谢）slows, and they stay beneath the ground until the next rain, which may be as good as a year away. Until then, their bodily activities continue at a reduced rate.

The camel---often called the ship of the desert---is one of the most successful desert animals. Camels can go for long periods without water, but eventually they must drink. When water becomes available to them after a long drought, they may drink 95 liters of water or more. When water is not available, what helps camels survive the desert heat is the fat stored in their humps. A camel’s hump contains about 12 kilograms of fat. Fat is rich in hydrogen. As the fat is digested, hydrogen from the fat combines with oxygen in the air that the camel breathes. The result is H₂O, or water. Each kilogram of fat that a camel digests produces about a liter of water.

71.     Desert animals are usually more active at night because ______.

A.        it is cooler at night

B.        it is easier to find water

C.        they like the dark

D.       they are less likely to be attacked at night

72.     Which of the following desert animals can get water only from the food?

A.        The camel              B. The kangaroo rat

C.   The frog.                 D. The toad

73.     Which of the following is TRUE according to the passage?

A.        All the desert animals rest during the day.

B.        All the desert animals don’t rest during the day.

C.        Cold-blooded desert animals don’t rest during the day.

D.       None of the cold-blooded desert animals go out during the day.

74.     The title for this passage could probably be ________.

A.        Hot Deserts

B.        Desert Animals

C.        How Desert Animals Get Water

D.       Ways To Escape the Desert Heat

75.     The underlined word “burrows” in the first paragraph can be replaced by _________.

A.        holes     B. caves     C. rooms      D. openings