【題目】Look！Half of the students ________ studying in the classroom right now.

A. is B. are C. was D. were

【答案】B

【解析】

句意：看！一半的學生現(xiàn)在在教室里學習。由look和right now可知時態(tài)為現(xiàn)在進行時。排除C/D；“half of +名詞”結構做主語，謂語動詞的單復數(shù)，取決于后面名詞的單復數(shù)。因為Half of the students后面的名詞students是復數(shù)，因此謂語動詞用are。故選B。

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