河南成教 / 大学英语3
正确率：100%
4、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
A. needn't tell
B. need tell
C. need have told
D. needn't have told
参考答案：