Wesuggestthattheyprovideaneffe

更新 2022-09-03
科目英语
题型单选题
难度中等
浏览 1239

挑错有奖

We suggest that they provide an effective warning system to ________ many of the disasters ________.

A．keep; happening

B．prevent; from happening

C．stop; from being happened

D．prevent; from being happened

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