单项选择题

Your mother must be at home, ______ she

A．mustn't
B．doesn't
C．isn't
D．needn't
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单项选择题
The city ______ a new look ______ the four new squares were built.
A．took on, before
B．has taken on, since
C．takes on, since
D．has been taken on, after
单项选择题
--Who did you spend the holiday with -- ______ .
A．Smith's
B．The Smiths
C．Smiths
D．The Smith's
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