问题
选择题
---I was trying to carry out the plan, but I failed.
---Well, you _________, for we were uncertain it would do ________.
A．needn’t do that, in fact
B．needn’t have done, in effect
C．needn’t have, in practice
D．needn’t, in time
答案
答案：C
第一空考查needn’t have done“本不必做而做了”，第二空填词组in practise“实际上”，句意是：--我想实施计划，但失败了。--你本不必，因为我不确定是否它会付诸实施。因为上文有动词carry out，所以needn’t have done后面的done被省略了。选C。