问题
选择题
-- Look at that girl. Is it Susan?
--No, it _______ be her. She has gone back to her home town .
A．can't
B．mustn't
C．needn't
D．may not.
答案
答案：A
根据文章内容She has gone back to her home town，可知答案为A，故选答案为A
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