题目内容
The water hyacinth (水胡芦) grows in tropical (热带的) countries. It has beautiful purple-blue flowers,but everybody hates it.
Millions and millions of these plants grow in rivers and lakes. Sometimes the plants become so thick that people can walk on them. People cannot travel in boats on the water,and they cannot fish in it. The plants stop the water from moving. Then the water carries diseases. Farmers cannot use the water on their land.
Now scientists think that water hyacinths can be useful. The plants are really a free crop. No one has to take care of them. They just grow and grow and grow. What can farmers use them for?
Some fish like to eat them. Farmers can grow these fish in the lakes and rivers.
Workers can collect and cut the plants with machines. Then they can also make fertilizer to make their crops grow better. They can also make feed (饲 料) for their farm animals.
Maybe it will be possible to make methane gas (沼气) for energy. Methane gas can be made from plants. We bum gas from petroleum (石、油) for energy. Then poor tropical countries will not have to buy so much expensive petroleum. Maybe in the future people will love the water hyacinth instead of hating it.
1. What color are the flowers of the water hyacinth?
A. Yellow.
B. Purple-blue.
C. Black and white.
D. Pink.
2. Paragraph 2 mainly tells us .
A. how water hyacinths grow in lakes
B. where water hyacinths live
C. why people hate water hyacinths
D. what makes the water carry diseases
3. Which of the following shows the water hyacinth is useful?
A. Farmers can feed their fish with the water hyacinth.
B. The water hyacinth grows so thick in rivers.
C. Boats can't move in the water with the water hyacinth.
D. The water hyacinth stops the water from running fast.
4. The underlined word “fertilizer” means “”in Chinese.
A. 资源 B. 财富
C. 垃圾 D. 肥料
5. According to the passage,which of the following is TRUE?
A. People must take good care of water hyacinths.
B. Scientists think water hyacinths are useless plants.
C. Maybe we can make methane gas from water hyacinths in the future.
D. People love water hyacinths very much now.
导读水葫芦以前是不被人喜欢的植物,但是现在科学家认为 水葫芦有一定的利用价值。
1. B细节理解题。由第一段的purple-blue flowers可知,水葫芦的花是蓝紫色的。
2. C主旨大意题。通读第二段可知,本段主要讲了人们不喜欢水葫芦的原因:人们不能乘船在水上自由滑行,也 不能钓鱼,里面的水携带疾病等。
3. A细节理解题。由第四段的内容可知,鱼喜欢吃水葫芦,故农民可以用水葫芦来养鱼,由此可知正确答案为A项。
4. D词义猜测题。画线词后面提到了 fertilizer可以使庄稼长得更好,由此可猜测fertilizer意为“肥料”,故选D项,其他三项均不符合此处语境。
5. C推理判断题。由最后一段第一、二句“Maybe it will be possible to make methane gas for energy. Methane gas can be made from plants. ”可推断,可能将来我们可以 利用水葫芦来制造沼气,故选C项。