问题
选择题
You can keep the book for another week, but you ______ lend it to others. [ ]
A. needn't
B. mustn't
C. aren't
D. must
答案
答案：B
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You can keep the book for another week, but you ______ lend it to others. [ ]
A. needn't
B. mustn't
C. aren't
D. must
答案：B