As we all know,________, the pollution will get worse and worse.A．not if careful_刷题宝

题干

As we all know,________, the pollution will get worse and worse.

A．not if carefully dealt with

B．until not carefully dealt with

C．if not carefully dealt with

D．when not carefully dealt with

上一题下一题 0.64难度单项选择更新时间:2013-01-15 08:26:24

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