Air is all around us. It's around us as we walk and play. When we sit down, it is around us. When we go to bed, air is also around us. We live in air. We can live without food or water for a few days, but we can't live for more than a few minutes without air. We take in(吸取) air. When we are working or running we need more air. When we are sleeping, we need less air.
We live in air, but we can't see it. We can only feel it. We can feel it when it is moving. Moving air is called wind. How can we make air move? Here is one way. Hold(举起) an open book in front of your face, close it quickly. What can you feel? What you feel is air.
1．Air is ______. (
)
| A．somewhere | B．nowhere | C．everywhere | D．in the sky |
2．We will die if we can't have ______ for some minutes. (
)
| A．food | B．water | C．air | D．clothes |
3．We can't ______ the air. (
)
| A．have | B．feel | C．get near | D．see |
4．When the air is going quickly, we have ______. (
)
| A．the snow | B．the cloud | C．the rain | D．the wind |
5．Which of the following is not true? (
)
| A．Air is very important to us. | B．We can't see the air. |
| C．We can't feel the air by shaking(摇动) a book near our face. | D．Air has no colour. |
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