题目内容
7. The firefighters tried their best to the forest fire.
A. work out B. look out C. put out D. keep out
7. C
7. C解析:由主语the firefighters以及 the forest fire 可知应用 put out“扑灭”。
work out “计算出”;look out “小心”; keep out“不让进入,留在外面”。
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