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

下列句子中，有两个错别字的一句是______。

A．他们的全家大合唱，为家庭凭添了几分温馨
B．他们你一言我一语，各不相让，真是唇枪舌箭
C．王伟驾着撩机在祖国领空监视着美国军用侦查机
D．书写应避免笔画增减，形迈相浑，部位错乱等错误