Module 9 Population 单元综合练（含答案解析）

B. has caused

C. caused

D. had caused 2.Students in Grade Nine _____ a maths exam at this time yesterday.

A. take

B. are taking

C. were taking

D. have taken 3.—Have you heard about Zhangjiajie Glass Footbridge —Of course, it's built over a _____ canyon in the Zhangjiajie National Forest Park.

A. 300-meter-deep

B. 300-meters-deep

C. 300 meter deep

D. 300-meters deep 4.According to a survey, four out of five women do housework at home, but only _____ of men would do it.

A.four fifth

B.four fifths

C.two fifth

D.two fifths 5.The food safety is a serious _____ in our country. We should try to solve it.

A.subject

B.programme

C.opinion

D.problem 6.It took me half an hour _____ my homework yesterday.

A. finish

B. finished

C. finishing

D. to finish 7.All the stores in the city d

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