单项选择题

Young ______ Tom was, be was able to swim across the channel within minutes.

A．although
B．though
C．so
D．as
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单项选择题
There are so many restaurants along the street that I'm not sure which one
A．to be eating at
B．to eat at
C．eating at
D．for eating at
单项选择题
We______ on it for many hours but we have not yet reached any concinsion.
A．work
B．have been worked
C．have been working
D．are working
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