1.Where was there a poor potato harvest?

A In Asia.

B In South America.

C In Europe.

D In Africa.

解析：选C。细节理解题。根据第一段第一句Europe grew a lot fewer potatoes this autumn.可知今年秋天欧洲种植的土豆少了很多，故选C。

2.Farmers grew ______ potatoes this autumn.

A 18% fewer

B 20% fewer

C 22% fewer

D 25% fewer

解析：选D。细节理解题。根据第一段第四句It had a long heatwave, record high temperatures and very little rain, so farmers grew 25 percent fewer potatoes.可知持续很久的热浪，创纪录的高温和极少的雨，今年秋天农民种植的土豆产量减少了25%，故选D。

3.Why will we be eating smaller chips?

A Because of the high cost of potatoes.

B Because of the government’s new rules.

C Because of smaller potatoes.

D ecause of many poorer people.

解析：选C。细节理解题。根据第一段最后一句Smaller potatoes mean French fries will be shorter.可知土豆变小意味着薯条会更短，故选C。

4.Which country has fries as its national dish?

A Uganda.

B Belgium.

C The USA.

D Brazil.

解析：选B。细节理解题。根据第二段第二句Fries are Belgium's national dish.可知薯条是比利时的国菜，故选B。

5.What’s the diameter of potatoes if we need to make 8 to 9cm-long French fries?

A 50mm.

B 45mm.

C 40mm.

D 35mm.

解析：选A。细节理解题。根据第二段倒数第二句He said long fries of 8 to 9 cm need potatoes with a diameter of more than 50mm.可知8到9厘米长的薯条需要直径超过50毫米的土豆，故选A。