If you had joined the chat room ten minutes ago, you _____________what we were talking about.  
#87954
A
would know
B
would have known
C
knew
D
had known
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——Do you think it necessary that he ________ to Miami but to New York? ——I agree, but the problem is ________ he has refused to. 
#90455
A
will not be sent; that
B
not be sent; that
C
should not be sent;what
D
should not send; what
Had it not been for the fact that about 30 pupils __________ in the state of Connecticut a fortnight ago, their parents ___________ in deep sorrow now.
#87155
A
had been killed, wouldn’t be
B
were killed, couldn’t be
C
would have been killed, mightn’t be
D
should be killed, wouldn’t be