问题
选择题
This book ______ be Peter's. His is still in his bag.[ ]
A. may not
B. can't
C. mustn't
D. needn't
答案
答案：B
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This book ______ be Peter's. His is still in his bag.[ ]
A. may not
B. can't
C. mustn't
D. needn't
答案：B