1. Listen! I (think) someone (knock) at the door.

2. Up to the present, we (write) almost every lesson in the book.

3. The earth (circle) the sun once every 365 days.

4. The farmers (work) in the field at the moment.

5. How many times you (see) him since he went to Edinburgh?

6. Rivers usually (flow) to the sea.

7. Look! The boy (cry).

8. Do you know that man, who (smoke) there?

9. Mrs Green always (go) to work by bus.

10. We (be) from France. We (be) there for 20 years.

11. That house (belong) to Mr. Green.

12. Mai (lose) her dictionary.

13. I (be) sorry. I (forget) that girl’s name already.

14. I (wait) for the manager for two hours.

15. You (ever, see) a lion?