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hadn't we didn't we hadn't he didn't he
happen happened happening happens
what happens what is happening what happen what happened
had thought was thinking thought think
- __________ to them? - Don’t you know the terrible earthquake? A. What happens What is happening What has happened What was happening
B.C.D.四个选项中，选出一个最佳答案。 He didn’t know what was___________/’hæpəniŋ /outsidE. A. happened happening happen .helping
shout shouts shouted shouting
what to take place what Tom has happened what is happening what the matter had been
leave out concentrate on look after watch over
what happens what is happening what happen what happened
had thought was thinking thought think
. fixed on focused fixing on focusing
where from which from where from that
is happening; moving happened; moving happened; moved is happening; to move
had thought was thinking thought think
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