题目内容
—Whose book is this?
—It ________be Mary's. J. K. Rowling is her favorite writer.
—No, it ______ be hers . She never brings novels to school.
A. may, mustn't B. can; can't
C. must; can't D. must; mustn't
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题目内容
—Whose book is this?
—It ________be Mary's. J. K. Rowling is her favorite writer.
—No, it ______ be hers . She never brings novels to school.
A. may, mustn't B. can; can't
C. must; can't D. must; mustn't