问题
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.
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
B:were killed, couldn’t be
C:would have been killed, mightn’t be
D:should be killed, wouldn’t be
正确答案是：
