David said he would come to have supper with us.But he_ We've been waiting for him for an hour
问题描述：
David said he would come to have supper with us.But he_ We've been waiting for him for an hour
主要是在A和D之间矛盾.
A、hasn't B、hadn't C、wasn't D、doesn't
答
hasn't We've been waiting for him for an hour.表明我们已经等了一个小时 通过其所用的时态现在完成进行时可以看出“我们现在还在等”,也就是说David 还没有来到现在还没有来,因此要用现在完成时填空.您说在A和D之...