问题
选择题
You _____ thank me. It's my duty to do so. [ ]
A. need to
B. don't need to
C. don't need
D. needn't to
答案
答案：B
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You _____ thank me. It's my duty to do so. [ ]
A. need to
B. don't need to
C. don't need
D. needn't to
答案：B