问题补充:
He said that he would write to us but so far we from him.
A. didn’t hear
B. haven’t heard
C. shouldn’t have heard
D. hadn’t heard
答案:
A. didn’t hear
(答案→)B. haven’t heard
C. shouldn’t have heard
D. hadn’t heard
解析:考查时态。根据题中so far 到目前为止,可知应用现在完成时态,句意:他说他会给我们写信但是到现在为止我们还没有收到他的来信。所以选B。