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---My Dad began to teach me English when I was eight.
---Wow. You must have studied English for six years,         ?
A.haven’t youB.mustn’t you C.needn’t youD.don’t you
A

试题分析: 句意:--我爸爸在我8岁的时候开始教我英语。--哇哦,你一定是学习英语6年了, 是吗?很明显这是一个反意问句,前面的陈述句部分用must have done是对过去的推测,反意问句要看时间,如果陈述句有具体的过去时间,就用一般过去式,如果陈述句部分没有具体的过去时间,就用现在完成时,这里的for 6 years是和现在有关的时间,用现在完成时,选A。
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