--I'm told that John had another car accident this morning.--I believe not. He  _________so careless.
#90014
A
shouldn't have been
B
wouldn't have been
C
couldn't have been
D
mustn't have been
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He must have attended the meeting yesterday,___________  he?
#88232
A
didn’t
B
mustn’t
C
needn’t
D
hasn’t
The students ______ to write English words carefully from the beginning. 
#87647
A
be trained
B
should be trained
C
train
D
to train
He pushed the door again and again, but it ___ open.
#89064
A
may not
B
can't
C
didn’t
D
wouldn't
 — Did you make it at last?— Yes. But for your help,it _____ a serious loss.
#86383
A
. had caused
B
ust have caused
C
. would have caused
D
ay cause