--Why didn’t you take part in the school reunion (团聚、重聚)yesterday? --I’m sorry, but not until last night ________ of it.
#83370
A
did I tell
B
was I told
C
I was told
D
I had told
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 For a moment nothing happened.Then ________ all shouting together.
#79829
A
voices had come
B
came voices
C
voices would come
D
did voices come
He failed in the exams and only then _____ how much time he had wasted. 
#81700
A
he realized
B
did he realize
C
he had realized
D
had he realized
 We laugh at jokes,but seldom            about how they work.
#79995
A
we think
B
think we
C
we do think
D
do we think
  Not until he got to the factory _______that he had lost his papers.
#83272
A
he found
B
did he find
C
had he found
D
has he found