问题补充:
His letter was especially welcome as I from him for long.
A. haven’t heard
B. would not heard
C. hadn’t heard
D. didn’t heard
答案:
A. haven’t heard
B. would not heard
(答案→)C. hadn’t heard
D. didn’t heard
解析:考查语境中的时态综合运用。从内容上看应为完成时,从所给信息看,应为过去时,这样就容易作出正确选择:过去完成时。