单项选择题

Mrs. Smith is a friend of ______.

A．John's mother's
B．John's mother
C．mother of John
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单项选择题
The horse is getting old and cannot run ______ it did.
A．as fast as
B．as faster as
C．as faster than
单项选择题
She could do her homework herself (她自己), so she ______ any help.
A．need not
B．not needed
C．didn't need
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