河南成教 / 大学英语4
正确率：100%
6[单选题]
You _ _ _ _ _ _ _ _ him about this since he could find out for himself.
A. needn't tell
B. need tell
C. need have told
D. needn't have told
You _ _ _ _ _ _ _ _ him about this since he could find out for himself.
参考答案：