—Oh, my God!  I can’t find my key to the office.
—Don’t worry.  Perhaps it______________ in your home.
A. left          B. has left       C. was left
C

試題分析：句意為：---哦，天啊，我找不到辦公室的鑰匙。---別擔(dān)心。也許它落在家里了。根據(jù)語境，鑰匙是被遺忘在家里了，有被動意義，應(yīng)用被動語態(tài)。故選C。
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