Wedon'tknowwhentheaccident______.[ ]A.hashappenedB.happened C.happeningD.tohappe -八年级英语

题目简介

Wedon'tknowwhentheaccident______.[ ]A.hashappenedB.happened C.happeningD.tohappe -八年级英语

题目详情

We don't know when the accident ______.          
[     ]
A. has happened        
B. happened      
C. happening          
D. to happe
题型:单选题难度:中档来源:同步题

答案

B

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