题目内容
This tape recorder is easy to work. Watch how I ______ it. I switch it on, press this button and it starts.[ ]
A.have done B.do
C.would do D.was doing
答案:B
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题目内容
This tape recorder is easy to work. Watch how I ______ it. I switch it on, press this button and it starts.[ ]
A.have done B.do
C.would do D.was doing