The lake near my home used to ________ clean.But now it's too dirty.A．wasB．isC．b_刷题宝

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The lake near my home used to ________ clean.But now it's too dirty.

A．was	B．is
C．be	D．are

上一题下一题 0.65难度单选题更新时间:2018-09-19 02:38:06

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