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A new sweet potato won the 2016 World Food Prize. The sweet potato has extra Vitamin A. This means it has more nutrition(营养). A researcher said farmers didn't want to help him grow the potato. He said, "They told me it was a bad idea." The farmers wanted more potatoes, not extra nutrition.

The sweet potato could stop people dying from malnutrition—not having enough to eat. A lack of Vitamin A is very harmful. Scientists say malnutrition harms 140 million children in 118 countries. It affects seven million pregnant(怀孕的) women and is a big reason for children becoming blind. The International Potato Center said the prize-winning sweet potatoes could help people get enough Vitamin A. It hopes there will be more vegetables with extra nutrition.

1.Why did the new sweet potato win the prize?

A Because the sweet potato is delicious.

B Because the sweet potato is easy to plant.

C Because the sweet potato has extra Vitamin A.

D Because the sweet potato has extra Vitamin B.

解析：选C。细节理解题。根据第一段第二句 The sweet potato has extra Vitamin A.可知，故选C。

2.What did the farmers want?

A More money.

B More nutrition.

C More time.

D More potatoes.

解析：选D。细节理解题。根据第一段最后一句The farmers wanted more potatoes, not extra nutrition.可知，故选D。

3.What does malnutrition cause?

A It makes people unhappy.

B It help fat people lose their weight.

C It makes some people lose their jobs.

D It may make children blind.

解析：选D。推理判断题。根据第二段第四句It affects seven million pregnant women and is a big reason for children becoming blind.可知，故选D。

4.The International Potato Center hopes _____.

A there will be fewer vegetables

B there will be more sweet potatoes

C there will be more vegetables with good flavor

D there will be more vegetables with extra nutrition

解析：选D。细节理解题。根据第二段最后一句It hopes there will be more vegetables with extra nutrition.可知，故选D。