问题
选择题
— Do you know whose book it is?
— It ______ be Li Lei's. His name is on it.
[ ]
A. can
B. may
C. might
D. must
答案
答案：D
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— Do you know whose book it is?
— It ______ be Li Lei's. His name is on it.
[ ]
A. can
B. may
C. might
D. must
答案：D