题目内容
Many people keep small fish as pets. They keep them in a tank (水槽) 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 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 pens. the amount (数量) of food is right.
根据短文内容选择最佳答案。
1.The underlined word “oxygen” means in the passage “________” in Chinese.
A.烟雾 B.二氧化碳 C.氧气
2.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.cold air may make the water too cold
3.The tank should be covered because ________.
A.some fish may jump out of the tank
B.the water may be dirty
C.it can keep the light away
4.Which of the following is NOT true according to the passage?
A.A lot of water in the tank may cause pet fish to die.
B.The size of the tank is important to fish.
C.When people feed the fish, the food should be eaten in 10 minutes.
5.Which is the main idea of this passage ________.
A.It tells us why fish must be put in a glass tank
B.It tells us how people should keep their pet fish
C.It tells us what kind of plants is good for pet fish
