This book ( ) Bob's.Look!That's his name.This book ( ) Bob's.Look!That's his name.A.may beB.must beC.can't beD.mustn't be说明原因

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

B后面一句可判断这本书的确是Bob的.