单项选择题

They want to know ______ do it to help us.

A．what can they
B．what they can
C．how they can
D．how can they
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单项选择题
He seems to ______ Jane. He knows her well.
A．introduce to
B．be introducing to
C．be introduced to
D．have been introduced to
单项选择题
-- Good morning, Grand Hotel. -- Hello, I'd like to book a room for the nights of the 18th and 19th. --______.
A．What can I do for you
B．Just a minute, please.
C．What's the matter
D．At your service.
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