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What happened __ you You look so worried. 1.He asked what（）A.did happen to her B.happened to herC.she happened D.did she happen 固定搭配：what happened ____（介词） 1.let's hurry,or we __ the train 2.Mr Green walked into the ciassroom____a smile on his face3.What ()you ()when the accident happened what has happened?I __ (lose) my key and can't open the door What had happened?What had happened?What had happened? 是What happened 还是what’s happened what happened=what's happened吗? what happened to 和what happened what （ ）in you country in the last few years A.happens B.happened C.has happened D.had happened what happened at last? what happened on What Happened to Us what happened then Dear,what happened to what happened to she what happened to him? What happened then.