How to feed a population is a problem that is many people. A.growing, troubling B. gro——青夏教育精英家教网—

摘要： How to feed a population is a problem that is many people. A.growing, troubling B. grown, troubled C. growing, troubled D. grown, troubling

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How to feed a ________ population is a problem that is _________ many people.

A. growing, troubling　　　　　　

B. grown, troubled

C. growing, troubled　　　　　　　

D. grown, troubling

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