We should do our best to prevent the river from __________.A．polluteB．pollutingC_刷题宝

题干

We should do our best to prevent the river from __________.

A．pollute

B．polluting

C．be polluted

D．being polluted

上一题下一题 0.65难度单选题更新时间:2017-10-27 06:04:21

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