A. playing　　　　　　　　　　　　　　　　 B. play

C. plays　　　　　　　　　　　　　　　　    D. played

　　Air is all around us. It is around us as we walk and play. From the time we are born, air is around us on every side. When we sit down, it is around us. When we go to bed, air is also around us. We live in air.

　　All living things need air. Living things cannot live without air. We can go without food or water for a few days, but we cannot live for more than a few minutes without air. When we are working or running, we need more air. When we are asleep, we need less air.

　　We live in air, but we cannot see it. We can only feel it. We can feel it when it is moving. Moving air is called wind. How can you make air move? Here is one way. Hold an open book in your hands in front of your face. Close it quickly. What can you feel? What you feel is the air.

　　1. Air is around us from the time we ______ born.

[　　]

　　 A. are 　　B. have 　　C. do 　　D. is

　　2. When we ______ , there is air around us.　　　　　　

[　　]

　　 A. walk 　　B. walking　　　　C. walks　　 D. walked

　　3. When you are ______ football, you need more air.

[　　]

　　 A. playing 　　B. play 　　C. plays 　　D. played

　　4. We can feel air when it is ______ .　　　　　　　　

[　　]

　　 A. move　　　　B. moves　　　　 C. moving 　　D. moved

　　5. Moving air ______ called wind.　　　　　　　　

[　　]

　　 A. is 　　B. has 　　C. are 　　D. was

　　6. When we are not ______ , we need less air.　　　　

[　　]

　　 A. run 　　B. runs　　　　C. ran 　　D. running

A. playing　　　　　　　　　　　　　　　　 B. to play

C. to play with　　　　　　　　　　　　  D. playing with

I want ______ volleyball (排球) with you.

[    ]

　　A. playing   B. to playing   C. played   D. to play

Do you see that girl _____ video games now?   

[　　]

A. playing　　B. to play　　C. plays　　D. is playing