2. 外语
  3. The fire must have______after the staff had gone home.

The fire must have______after the staff had gone home.

admin2015-06-27  0
问题 The fire must have______after the staff had gone home.
选项 A、broken down
B、broken up
C、broken out
D、broken off
答案C
解析 根据题干可知，所填短语的主语为fire。[C]broken out“(指火、战争等)爆发”，符合题意，故为答案。[A]broken down“(机器等)坏了”、[B]broken up“打碎，拆散”、[D]broken off“(电等)中断”均不与fire搭配。
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