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【題目】The water dark and dirty. It’s no longer safe to drink.

A. became B. will become C. has become D. was becoming

【答案】B

【解析】試題分析：句意：水變得又臟又黑，已經不能繼續(xù)安全飲用了。根據It’s no longer safe to drink.可知，給現在帶來的結果是不能飲用了，所以用現在完成時，表示過去的動作對現在的影響，故選B。

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