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【题目】— Look at the man in blue! Do you know _____?
—Oh, he is a policeman.
A.what does he
B.what he does
C.how he does

【答案】B
【解析】句意:--看那个穿着蓝色衣服的男人。你知道他是干什么的吗?--哦,他是个警察。宾语从句的结构:主语+谓语+连接词+从句。从句在句中作宾语。从句要用陈述句的语序。如果主句是一般现在时,从句根据需要选择时态,如果主句是过去时态,从句要用相应的过去时态。但是从句是客观真理,一般用一般现在时态。A选项语序错误;C项中的疑问词有误,提问职业用what。故选B。

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