单项选择题

His sister read the picture-book three times yesterday,______.

A．so she did
B．she did so
C．so did she
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单项选择题
— Look! That man looks like Mr. Brown. — It______ be him, for he ______ America.
A．can't; has gone to
B．can't; has been to
C．mustn't; has been to
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