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Ifatrainthistunnel,itwoulddrawinfreshairbehindit.A.wouldenterB.enteredC.willenterD.enters

题目详情
If a train_this tunnel,it would draw in fresh air behind it.
A.would enter B.entered C.will enter D.enters
▼优质解答
答案和解析
D. enters
就是 这样 说的 , 怎麽 解释