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7.-Do you know ________?-Since last year.(  )
A.when he joined the army
B.when did he join the army
C.how long has he been in the army
D.how long he has been in the army

分析 --你知道他在部队多长时间了吗?
自从去年以来.

解答 答案:D.
根据Do you know,可知本句考查了宾语从句的用法.在宾语从句中所使用的语序应该是陈述句语序,选项BC是疑问句语序,排除掉.再根据Since last year,可知这里since后面跟一个过去的时间,通常用于现在完成时之中,构成:have/has+动词的过去分词,提问一段时间应该用how long.故选D.

点评 此题考查宾语从句.考生在答题时要注意"宾语从句必须采用陈述语序",根据上下文语境确定合适的选项.

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