The rubbish every day is becoming a serious problem in cities around the world. [ ]A. produce B. produced C. producer D. producing 题目和参考答案——青夏教育精英家教网——

题目内容

The rubbish _____ every day is becoming a serious problem in cities around the world.

[ ]

A. produce
B. produced
C. producer
D. producing

B

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[ ]

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