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试卷名称:大学英语三级（A级）模拟试卷34

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常规阅读理解（task1）

If you think you have a puncture(漏气), first check the valve(阀门) to make sure air is not leaking from it, by putting spit on the end of it. If the valve is not the source of the leak, remove the wheel from the bicycle and take the tyre off. Be careful not to pinch(挤、扎) the inner tube. Remove the inner tube and pump some air into it. Then hold it in a bowl of water until you see bubbles(气泡) coming from it. Or, hold the tube to your ear and listen for air escaping. Dry the tube. Choose a patch that is big enough to cover the hole and the surrounding area. Apply glue to the tube before sticking patch down. Before you put the tube back in the tyre, run your fingers over both the inside and outside of the tyre to make sure that whatever caused the puncture is not still there. To replace the tube, put the valve part way through the hole in the rim(轮圈), pump a little air in, and then feed it carefully under the tyre. Push the tyre over the rim and back into position. Do not use tyre levers for doing this. Pump up the tyre fully and replace the wheel on the bicycle. Make sure the wheel is positioned in the centre of the frame.

This passage is intended for someone who ______.

A．buys a new bike

B．learns to ride a bike

C．has a flat tyre

D．travels by bike

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If the tyre leaks, you should first ______.

A．check the valve

B．replace the tyre

C．go to the repairman

D．pump some air into the tube

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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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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

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The passage implies that if the air leakage came from the valve, ______.

A．you would still need to examine the inner tube

B．it would be unnecessary to do anything about the inner tube

C．you could solve the problem by putting spit on it

D．there would be no way to solve the problem

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