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

A.becameB.has becomeC.will becomeD.was becoming

【答案】B

【解析】

句意:水已經(jīng)變得又黑又臟,再也不能安全飲用了。

本題考查時態(tài),根據(jù)題意可知,這里表示水已經(jīng)不能再喝了,所以是過去發(fā)生的事情對現(xiàn)在產(chǎn)生了影響,應(yīng)該用現(xiàn)在完成時,所以本題選B。

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