Like all insects, ants have six legs. Each leg has three joints(关节). The legs of an ant are very strong so they can run very quickly. If a man could run as fast for his size as an ant can, he could run as fast as a horse. Ants can lift 20 times their own body weight.

The life of an ant is usually 45～60 days. Ants use their antennae(触角) not only(不但)for touch, but also(而且) for smell. The head of an ant has a pair of large , strong jaws(颚). The jaws open and shut sideways like a pair of scissors(剪刀). Grown-up ants cannot eat hard(硬) food. Instead they have the juice that they get from pieces of food. They throw away the dry part that is left over. An ant has two stomachs. One stomach holds the food for itself and the other is for food to be given to other ants. Like all insects, the outside of their body is hard..

Each ant group has at least one or more queens(蚁后). The job of a queen is to lay eggs and worker ants look after them.

Worker ants look after the young, protect(保护) the nest(巢) from unwanted visitors and look for food. At night worker ants move the eggs and baby ants deep into the nest to protect them from the cold. During the daytime, worker ants move the eggs and babies to the top of the nest so that they can be warmer. Each group of ants has its own smell. In this way, visitors can be made out at once. If a worker ant has found where the food is, it leaves a special smell so that the other ants in the group can find the food. Ants are clean and tidy insects. Some worker ants are given the job of taking the waste from the nest and putting it outside in a special rubbish dump(堆)!

(     ) 51. Ants can run very quickly because_______________________.

A. they have six legs              B. they are light in weight

C. their legs are strong            D. their legs have three joints

(     ) 52. The antennae of the ants are used to _____________________ .

A. touch and smell              B. move and watch   

C. get and eat food              D. open and shut sideways

(     ) 53. According to the passage, ants ________________________ .

A. eat up all the food            B. share (分享) food with others    

C. have three pairs of scissors     D. can live for three months

(     ) 54. Which sentence is right according to the passage?

A.      An ant has a long life of more than a year.  

B.      Ants can lift 2 times their own body weight.

C. There is only one queen in an ant group.   

D. Ants can tell the stranger easily by the smell.

(     ) 55. A worker ant does Not ____________________.

A. lay eggs                 B. clean their nest

C. look for food              D. look after baby ants

　　Ants are small, but they are strong for their size. They can carry heavy things.

　　Each ant has six legs. There are about 20 000 kinds of ants. Most of them are brown or black. Some ants are yellow, some are green, some are blue. A large ant can be 2.5 cm long. A small ant is about 0.1 cm long.

　　Most ants like warm places. Some ants live in the earth. Some live in plants.

　　In an ant colony, there are hundreds, thousands, or even millions of ants. Queen ants lay eggs. Worker ants collect and store food. They also look after eggs and babies.

根据短文信内容选择最佳答案。

(1) Ants can carry ________ things.

(2) Each ant has ________ legs.

(3) A large ant can be ________ long.

(4) Most ants like ________ places.

(5) ________ collect and store food.

A lift is wonderful. It is really only a small room. Rooms usually stay in one place. Lifts travel up and down all day long.
Sometimes a worker stands in the lift. He or she operates it up and down. In modern lifts there is no worker. The people walk in. They know what floor they want. They push a button and the lift goes to that floor. It is all very fast and easy.
Lifts are very important to us. Why? Think about a tall building. Maybe it has twenty floors. Maybe it has fifty or more. Who can walk up all the stairs? Maybe people can climb them one time. Can someone climb thirty floors to an office every day? Can small children walk up to their room on the twenty-fourth floor? Can their mother and father carry food up all those stairs? Of course not.
We can have high buildings because we have lifts. We could not have all the beautiful tall buildings in the world without lifts. They are really wonderful.

1. 1.

   Which of the following is true?

   1. A.
      A modern lift has no buttons.
   2. B.
      A modern lift has a worker to operate it.
   3. C.
      A modern lift can go up and down with no worker in it.
   4. D.
      A modern lift knows what floor people want.
2. 2.

   If you want to go to the floor you want, you_______.

   1. A.
      ask for help
   2. B.
      open the door of the lift
   3. C.
      ring the bell
   4. D.
      push the right button
3. 3.

   Why do people have to use lifts? Because________.

   1. A.
      they have tall buildings
   2. B.
      they can't walk up and down
   3. C.
      old people and children need them
   4. D.
      lifts are wonderful

The Blacks are American tourists. They visits now in Beijing. This is their first visit to China. They are going to stay in China for three months. They want to visit some big cities and villages. They hope to learn some Chinese, too.
Mr Black is a taxi driver. He likes to drive in Beijing. Mrs Black is a school teacher. She is visiting a city school today and a village school tomorrow. Their daughter is a middle school student. She is going to meet some Chinese students.
They are taking a lot of pictures in China. When they return to America, they are going to show the pictures to their friends. They want the American people to know more about China.
【小题1】The Blacks are from________.