【題目】Half of the boys __________ finished the homework as some exercises __________ really difficult .

A. haven’t , is B. hasn’t , are

C. hasn’t , is D. haven’t , are

【答案】D

【解析】

試題分析:句意:由于一些練習真的很難,一半的學生沒有完成作業(yè)。half of the boys一半的學生,作主語視作復數(shù)形式。故答案為D。

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