10. Look! The children __________ (swim) happily in the river.

9. I’m too tired. Let’s __________ (stop) to have a rest.

8. When school was over yesterday, it __________ (snow).

7. Is that house large enough for all of us __________ (live) in?

6. Here __________ (come) the bus!

5. You have to spend half an hour __________ (read) English every day.

4. We __________ (come) if it doesn’t rain tomorrow.

3. Have you read the book __________ (call) “Gone with the wind”?

2. If we __________ (take) good care of the young trees, they will grow up quickly.

1. I’m not sure whether I __________ (be) on time.