题目内容
I had no idea when World War Ⅱ________,so I turned to my teacher for help.
A.broke down B.broke out
C.broke in D.broke away
B
break down“(化合物)分解,出故障,(健康、精神等)垮下来”;break out“(战争、火灾、疾病、战争等)突然爆发”;break in“闯入,打断”;break away“脱离,脱逃”。
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