Probably you have seen photos of the Grand Canyon（峡谷）, the great valley in the desert country of Arizona. But you must go there yourself to feel its true size and beauty. The Grand Canyon is one of the greatest natural wonders of the world

The Colorado River formed the Grand Canyon over millions of years. Slowly, the river cut down through hard rock. At the same time, the land was rising. Today the canyon is 1.5 kilometers and 445 kilometers long. The oldest rocks at the bottom of the canyon are more than 1 billion years old. The width varies from about 200 meters to 29 kilometers across. The rim or top of the canyon is about 2,300 meters above sea level on the South Rim, and about 3,000 meters on the other side. As a result, there are different kinds of plants and animals on opposite sides of the canyon. The South Rim is dry desert country. The North Rim has tall forests.

The canyon looks different at different times of day, and in different seasons and weather. At sunrise and sunset the red, gold, brown and orange colors of the rocks are especially clear and bright. In winter, the canyon is partly covered with snow.

The view from the South Rim of the Grand Canyon is the best. Most visitors come here and stay in campgrounds or hotels. Every point along the canyon’s edge offers a different view.

The North rim of the Canyon is quieter. It takes all day to drive there from the South Rim because there is only one bridge across the Colorado River. On the way, you go through Navado Indian lands, and a colorful pink desert called “The Painted Desert”.

The best way to feel the true beauty of the Grand Canyon is to________.

A. see its photographs                      B. listen to the report about it

C. watch its introduction on TV             D. go there yourself and visit it

The scene of the canyon is ________.

various depending on different time and places

almost the same    

various depending on different time

various depending on different places

If you want to visit the North Rim from the South Rim, you________.

A．can go there in many direction                B．won’t spend much time on the way

C．can visit The Painted Desert on the way       D．needn’t go across any bridges

If you want to have a visit to the Grand Canyon, you’d better go to _______.

A. the North Rim     B. the South Rim   C. the bottom        D. Navado Indian Lands

Probably you have seen photos of the Grand Canyon（峡谷）, the great valley in the desert country of Arizona. But you must go there yourself to feel its true size and beauty. The Grand Canyon is one of the greatest natural wonders of the world

The Colorado River formed the Grand Canyon over millions of years. Slowly, the river cut down through hard rock. At the same time, the land was rising. Today the canyon is 1.5 kilometers and 445 kilometers long. The oldest rocks at the bottom of the canyon are more than 1 billion years old. The width varies from about 200 meters to 29 kilometers across. The rim or top of the canyon is about 2,300 meters above sea level on the South Rim, and about 3,000 meters on the other side. As a result, there are different kinds of plants and animals on opposite sides of the canyon. The South Rim is dry desert country. The North Rim has tall forests.

The canyon looks different at different times of day, and in different seasons and weather. At sunrise and sunset the red, gold, brown and orange colors of the rocks are especially clear and bright. In winter, the canyon is partly covered with snow.

The view from the South Rim of the Grand Canyon is the best. Most visitors come here and stay in campgrounds or hotels. Every point along the canyon’s edge offers a different view.

The North rim of the Canyon is quieter. It takes all day to drive there from the South Rim because there is only one bridge across the Colorado River. On the way, you go through Navado Indian lands, and a colorful pink desert called “The Painted Desert”.

1.The best way to feel the true beauty of the Grand Canyon is to________.

2. The scene of the canyon is ________.

3. If you want to visit the North Rim from the South Rim, you________.

4. If you want to have a visit to the Grand Canyon, you’d better go to _______.

Probably you have seen photos of the Grand Canyon（峡谷）, the great valley in the desert country of Arizona. But you must go there yourself to feel its true size and beauty. The Grand Canyon is one of the greatest natural wonders of the world

The Colorado River formed the Grand Canyon over millions of years. Slowly, the river cut down through hard rock. At the same time, the land was rising. Today the canyon is 1.5 kilometers and 445 kilometers long. The oldest rocks at the bottom of the canyon are more than 1 billion years old. The width varies from about 200 meters to 29 kilometers across. The rim or top of the canyon is about 2,300 meters above sea level on the South Rim, and about 3,000 meters on the other side. As a result, there are different kinds of plants and animals on opposite sides of the canyon. The South Rim is dry desert country. The North Rim has tall forests.

The canyon looks different at different times of day, and in different seasons and weather. At sunrise and sunset the red, gold, brown and orange colors of the rocks are especially clear and bright. In winter, the canyon is partly covered with snow.

The view from the South Rim of the Grand Canyon is the best. Most visitors come here and stay in campgrounds or hotels. Every point along the canyon’s edge offers a different view.

The North rim of the Canyon is quieter. It takes all day to drive there from the South Rim because there is only one bridge across the Colorado River. On the way, you go through Navado Indian lands, and a colorful pink desert called “The Painted Desert”.

60. The best way to feel the true beauty of the Grand Canyon is to________.

A. see its photographs                              B. listen to the report about it

C. watch its introduction on TV                       D. go there yourself and visit it

61. The scene of the canyon is ________.

A. various depending on different time and places

B.almost the same

C.various depending on different time

D. various depending on different places

62. If you want to visit the North Rim from the South Rim, you________.

A．can go there in many directions               B．won’t spend much time on the way

C．can visit The Painted Desert on the way       D．needn’t go across any bridges

63. If you want to have a visit to the Grand Canyon, you’d better go to _______.

A. the North Rim     B. the South Rim   C. the bottom        D. Navado Indian Lands

Winter in the north is usually very cold and it is important to avoid colder-related injuries such as frostbite(冻伤) and hypothermia(体温降低)．Frostbite is damage that happens when skin is exposed to extreme cold for too long．It mainly happens on the hands，feet，nose，and ears and some will bring permanent damage．Hypothermia is a serious medical condition caused by serious cold．It happens when the body cannot produce as much heat as it loses．If not treated，it can be deadly．
The best way to avoid cold-related injuries is to be prepared for the outdoors．Here is a simple way to remember four basic steps to staying warm．Think of COLD．
The C stands for cover．Wear a hat and scarf to keep heat from escaping through the head，neck，and ears．And wear mittens instead of gloves．Mittens are a type of glove that does not have separate parts for each finger．Gloves may not keep hands as warm because they separate the fingers．
The O stands for overexertion(过分用力)．Avoid activities that will make you sweaty．Wet clothes and cold weather are a bad mix．
L is for layers．Wearing loose，lightweight clothes，one layer on top of another, is better than single heavy layer clothing．Also，make sure outerwear is made of water resistant and tightly knit material．
The last letter D stands for dry．In other words，stay as dry as possible．Pay attention to the places where snow can enter, like the tops of boots．the necks of coats and the wrist areas of mittens．
And there are a couple of other things to keep in mind，one for children and the other for adults．Eating snow might be fun but it lowers the body's temperature．And drinking alcohol might make a person feel warm，but what it really does is weaken the body's ability to hold heat．
67．Both frostbite and hypothermia        ．
A．are injuries caused by extreme cold
B．may happen on the hands，feet，nose and ears
C．may cause uncontrollable shaking and slow breathing
D．may be deadly injuries
68．Mittens can keep your hands warmer than gloves because           ．
A．they are thicker                     B．they are made of better materials
C．they don't separate your fingers        D．they separate your fingers
69．      can help you avoid cold-related injuries．
A．Trying your best to exercise until you get sweat
B．Wearing layers of loose，lightweight clothes
C．Drinking alcohol to make you feel warm
D．Wearing a single heavy layer of clothing
70．Overexertion should be avoided because         ．
A．it may exhaust you       B．it may make you hungry
C．it may make you sweat     D．it may lower your body temperature

Winter in the north is usually very cold and it is important to avoid colder-related injuries such as frostbite(冻伤) and hypothermia(体温降低)．Frostbite is damage that happens when skin is exposed to extreme cold for too long．It mainly happens on the hands，feet，nose，and ears and some will bring permanent damage．Hypothermia is a serious medical condition caused by serious cold．It happens when the body cannot produce as much heat as it loses．If not treated，it can be deadly．

The best way to avoid cold-related injuries is to be prepared for the outdoors．Here is a simple way to remember four basic steps to staying warm．Think of COLD．

The C stands for cover．Wear a hat and scarf to keep heat from escaping through the head，neck，and ears．And wear mittens instead of gloves．Mittens are a type of glove that does not have separate parts for each finger．Gloves may not keep hands as warm because they separate the fingers．

The O stands for overexertion(过分用力)．Avoid activities that will make you sweaty．Wet clothes and cold weather are a bad mix．

L is for layers．Wearing loose，lightweight clothes，one layer on top of another, is better than single heavy layer clothing．Also，make sure outerwear is made of water resistant and tightly knit material．

The last letter D stands for dry．In other words，stay as dry as possible．Pay attention to the places where snow can enter, like the tops of boots．the necks of coats and the wrist areas of mittens．

And there are a couple of other things to keep in mind，one for children and the other for adults．Eating snow might be fun but it lowers the body's temperature．And drinking alcohol might make a person feel warm，but what it really does is weaken the body's ability to hold heat．

67．Both frostbite and hypothermia        ．

A．are injuries caused by extreme cold

B．may happen on the hands，feet，nose and ears

C．may cause uncontrollable shaking and slow breathing

D．may be deadly injuries

68．Mittens can keep your hands warmer than gloves because           ．

A．they are thicker                     B．they are made of better materials

C．they don't separate your fingers        D．they separate your fingers

69．      can help you avoid cold-related injuries．

A．Trying your best to exercise until you get sweat

B．Wearing layers of loose，lightweight clothes

C．Drinking alcohol to make you feel warm

D．Wearing a single heavy layer of clothing

70．Overexertion should be avoided because         ．

A．it may exhaust you       B．it may make you hungry

C．it may make you sweat     D．it may lower your body temperature