问题
选择题
－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
答案：C
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。
