试题与答案

-Why does the river smell terrible? -Bec

题型:选择题

题目:

-Why does the river smell terrible?

-Because large quantities of water______.

A.have been polluted

B.is being polluted

C.has been polluted

D.have polluted

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, B, C, D

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