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---- What do you think made Mary so upset ?
---- __________.
A．As she lostB．LostC．Losing D．Because of losing
C
考查動名詞做主語，句意是：什么使瑪麗這么難過？--她丟了新自行車。說明回答的內(nèi)容是主語，完整的句子是Losing her new bicycle made mary so upset。選C。
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