Many people keep small fish as pets. They keep them in a tank of water. The tank is made of clear glass. People can look through it. They can see inside the tank and watch the fish.

The fish need room. They must not be crowded. Fish need oxygen(O2) to breathe. Fish get it from water in the tank. There must be enough water for all fish. So the size of the tank is important.

In the tank many people put small plants that are good for fish. They give oxygen to the water. Plants help in other ways, too. Fish can nibble(轻咬)on the plants. They hide among the plants and sleep, lay eggs there.

The plants need light. Most fish need light too. The tank may be put near a window. It will get light there. Another place might be better, though. A window may let cold air in. The water in the tank may get too cold. The fish may die because cold water can kill them. So can hot water. The temperature must be just right.

The fish must be kept in water all the time. Some fish can jump high. They may jump out of the tank. The tank should be covered. This keeps the fish from jumping out.

The fish need food and they should be fed every day. Giving them too much food is bad. The extra(额外的)food will fall to the bottom and make the water dirty. However, the fish should get just enough food.

They should finish the food in 10 minutes. Nothing should be left. When this happens, the amount(数量)of food is right.

1.A tank near the window may NOT be good for pet fish because __________.

A. no air can get in through the window B. pet fish will jump out of the window

C. plants in the tank will grow too big D. cold air may make the water too cold

2.__________ is the least important to pet fish.

A. Water temperature B. Sunlight

C. The amount of food D. The size of the tank

3.Which of the following may cause pet fish to die?

A. Too little room for fish. B. The plants in the tank.

C. The light through the window. D. A lot of water in the tank.

4.The word “this” in the last paragraph refers to(指的是)___________.

A. giving pet fish too much food B. giving pet fish too little food

C. giving pet fish the right amount of food D. giving pet fish neither too cold nor too hot water

5.This passage mainly talks about _________.

A. why fish must be put in a glass tank B. how people should keep their pet fish

C. what kind of plants is good for pet fish D. how much food should be given to pet fish

There was a sheepdog(牧羊犬)named Wylie. You couldn’t imagine how____ she was! She could ____ the sheep well. She drove them out to _____ when they were hungry, and brought them home when it was time to sleep. When the sheep got afraid, Wylie knew well ___ to do.

But later, she was given to two kind men in the nearest town _____ her master(主人)was too old. There Wylie didn’t have to do any work --- she was just a ____ dog. She looked happy at first. But not long, the family noticed something____ about their pet. Every Tuesday night, Wylie went out and came back with her _____ coat wet the next morning. _____ knew where Wylie went.

Near the town was a big market. Farmers brought their sheep there for sale. The sheep were__being there. But every ___morning, the farmers would see a little dog with silk coat come. The little dog ___the sheep like a school-teacher. She made them quiet but ___ hurt them! Every farmer would like to ____the helpful dog but couldn’t catch her.

One day Wylie’s masters went to the market _______her, and they met the sheep farmers. At that time, everyone knew the fact. Then they all loved Wylie better than ever.

1.A. weak B. beautiful C. clever D. silly

2.A. look for B. compare with C. take care of D. keep away from

3.A. sleep B. eat C. swim D. play

4.A. when B. how C. why D. what

5.A. because B. although C. unless D. if

6.A. show B. police C. pet D. guide

7.A. common B. wonderful C. clear D. strange

8.A. house B. winter C. silk D. paper

9.A. Everybody B. Nobody C. Anybody D. Somebody

10.A. afraid of B. pleased with C. interested in D. excited about

11.A. Tuesday B. Wednesday C. Thursday D. Friday

12.A. sold B. hurt C. led D. hit

13.A. sometimes B. always C. often D. never

14.A. keep B. drive C. save D. help

15.A. for B. by C. to D. with

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