问题
选择题
—Whose book is this?
—It _______ be Joan's. There is her name on the cover. [ ]
A. might
B. may
C. must
D. shall
答案
答案：C
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—Whose book is this?
—It _______ be Joan's. There is her name on the cover. [ ]
A. might
B. may
C. must
D. shall
答案：C