为什么是这个答案When he heard the loud noise,he went out to see what
为什么是这个答案
When he heard the loud noise,he went out to see what___.
A.has happened B.had happened C.was happened D.is happening
E.was happening答完后说下为什么?已经是做过的事为什么不是过去完成式?
When he heard the loud noise,he went out to see what___.
A.has happened B.had happened C.was happened D.is happening
E.was happening答完后说下为什么?已经是做过的事为什么不是过去完成式?
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