3.　 　　　　　(cover) more than 500 mu, our school is the biggest in the city.

2. He remained 　　　　(amaze) long after he had been told the story.

1. When first 　　　　(introduce) to the market, these products enjoyed great success.

4. She doesn’t usually 　　　　　any of the class activities.

3. Which school do your children 　　　　？

2. I felt so unfit after Christmas that I decided to 　　　　a gym.

1. Won’t you 　　　　us 　　　　a tennis match?

4. What was her 　　　　for why she was late?

C. take part in/join/join in/attend

3. Read the 　　　　carefully before you operate the machine.

2. When we came closer, the birds flew in all 　　　　.