【題目】If people keep______the river, there will be no fish in the river.

A. polluting B. pollute

C. polluted D. to pollute

【答案】A

【解析】句意:如果人們繼續(xù)污染這條河流,河里將不會有魚了。keep doing sth.一直做某事,不斷做某事。故答案選A。

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