题目内容：

 

1.He _______ ever ________ (be) to the amusement park several times.

2. I’m sorry I didn’t finish ___________ (write) my composition.    

3.I have been ________ (skate) for two hours.

4.________ you ________ (teach) us computer science next year.

5. I went there last year and _________ (fall) in love with it.

6.They ___________ (fly) to the moon in ten years.

7. I will go to the water park if it __________ (not rain) tomorrow.

8.When Mr. Cook got home, his son ___________ (listen) to the radio.

9.The old man makes a living by ________ (sell) vegetables.

10.The box is too heavy. I’m not strong enough _________ (carry) it.