单项选择题

You may examine whether air is leaking from the tyre by ______.

A．removing the wheel from the bike
B．drying the inner tube
C．running your fingers over the inside of the tyre
D．listening for air escaping
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单项选择题
From the context we may see that a lever is a tool which can be used to ______.
A．push the tyre back into position
B．take out the inner tube
C．remove the wheel from the bike
D．replace the wheel on the bike
单项选择题
Come on, Peter. I want to show you something. Oh, how nice of you. I ______ you ______ to bring me a gift.
A．never think, are going
B．never thought, were going
C．didn't think, were going
D．hadn't thought, were going
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