Tony ____ the invitation, otherwise he would have attended your birthday party. 
#86508
A
couldn’t have received
B
mustn’t have received
C
needn’t have received
D
shouldn’t have received
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If it   for your help,we would be in serious trouble.
#88964
A
isn’t
B
aren’t
C
hasn’t been
D
weren’t
The safety belt saved the boy; otherwise, he _____ in the accident.
#86842
A
would be killed
B
was killed
C
had been killed
D
would have been killed