单项选择题

It's cold outside. You'd better ________ your coat.

A．to put on
B．put on
C．are putting
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单项选择题
—It isn't my bike. Whose is it—It's _________.
A．he
B．him
C．his
单项选择题
Lucy can run as ______ as Jim.
A．more quickly
B．quicker
C．quickly
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