Kudzu is a fast-growing vine(蔓生植物) that covers a large area in the southern United States. It is so common that one might think it is a native plant, but it is not. Kudzu was brought to the United States from Japan in 1876. Many Americans thought it was beautiful, and they began to plant it. They didn’t know it could grow up to a foot a day during the summer months. Nor did they know it would grow up and over anything in its path(路径).
In Japan, kudzu experienced cold winters and a short growing season. But in the United States, it has a very long growing season with warm and wet southern weather. It is fine weather for the vine to grow fast.
In the 1920s, people used the vine to feed farm animals. Ten years later, the government supported to plant kudzu because it kept soil(土壤) from washing away. However, by the 1950s, the government no longer wanted people to plant the vine. Twenty years after that, the government said it was a harmful plant.
The vine grows up trees and buildings, making some beautiful shapes. However, trees die after kudzu covers them because they can not get enough light. Scientists are looking for ways to kill the vine. They used poisons(毒药) to kill the vine. However, some of the poisons made it grow even better. Scientists also find it difficult to dig up Kudzu. The plant is really tough.
Because kudzu is so hard to kill, some people are making the best of it. So they try to find different uses for the vine. They find the vine can be used to make paper and baskets, it can be used to feed the goats, and it can even be eaten by people. Scientists are studying it in the hope that the vine can be used as a medicine. At the very least, kudzu serves as an example of the unexpected results that can come from non-native plants.
We can learn from the passage that        .

A．kudzu mostly grows in the northern America

B．kudzu was brought to Japan from America

C．kudzu grows very fast in warm and wet weather

D．American government has never supported to plant kudzu

The underlined word “tough” in Paragraph 4 probably means “      ”.

A． not easily broken	B．widely used
C．hard to grow	D．important to one’s health

The last paragraph is mostly about        .

A． how quickly the vine grows

B．how people use the vine

C．why people want to kill the vine

D．why people eat the vine

The writer uses the title “The Vine That Ate the South” most probably to        .

A．let readers know kudzu is a vine

B．interest readers in a way

C．tell readers the vine is a kind of food

D．get readers to realize the passage is serious

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