单项选择题

This growth,（）mainly in Southeast Asia and Africa, has dramatic consequences.

A.happens
B.which is happening
C.which happening
D.which happened

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单项选择题
Sixty million people who（）in rural areas are moving to cities every year.

A.lived
B.lives
C.living
D.live
单项选择题
I spent most of my money in the first week and（）had very little for food at the end of the holiday.

A.since
B.however
C.moreover
D.consequently
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