问题描述：
This book ( ) Bob's.Look!That's his name.
This book ( ) Bob's.Look!That's his name.
A.may be
B.must be
C.can't be
D.mustn't be
说明原因
This book ( ) Bob's.Look!That's his name.
A.may be
B.must be
C.can't be
D.mustn't be
说明原因
问题解答：
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