问题补充:
He told you that because you have known the truth.
A. needs not have
B. need not have
C. need not has
D. does not need have
答案:
A. needs not have
(答案→)B. need not have
C. need not has
D. does not need have
解析:考查情态动词表示虚拟语气的用法:needn’t have done“本不必做而做了”,句意是:因为你已经知道事实了,他本没有必要告诉你的。选B