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第139頁

信息發(fā)布者：

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We should learn about keeping ourselves safe from any possible danger.

If you are in a building on fire, you must cover your mouth and nose with a wet towel to prevent thick smoke.

It is very important for everyone to follow the traffic rules.

It's very dangerous to walk through the flood water.

If you burn your hand, you'd better first put your hand in the cold water for about ten minutes.

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