－We could have asked Mr. Zhang for help. He is always ready to help others.－I that. A lon

问题补充：

－We could have asked Mr. Zhang for help. He is always ready to help others.

－I that. A long time .

A. have forgot, wastes

B. forgot, wasted

C. forgot, was wasted

D. forgot, has been wasted

答案：

A. have forgot, wastes

B. forgot, wasted

(答案→)C. forgot, was wasted

D. forgot, has been wasted

解析：考查时态。句意：我们本可以向张先生寻求帮助的，他总是乐于助人。我忘记那事了，浪费了很长时间。根据语境，忘记和浪费的动作都发生在过去，所以都使用一般过去式，选C。