6. When he ____________(finish) his work, he ____________(ring) me up.

5. We ______ (learn) English for more than two years.

4. Rodgers ______ (plant) those trees. He _______ (do) it the day before yesterday.

3. -Where is Mr. Wang?

-He _________ (go) to the library. He wants to borrow some library books.

2. - _______________ you ever _____________ (be) to the zoo?

-Yes. I ________ (go) there last summer. I _______ (see) many kinds of animals there.

1. He ___­­­­________ ever ___________ (be) to the History Museum several times.

9. Many people , e_____________ young people like American movies.

8. Chinese students are interested in European c_________________.

7. He has been a tour g______________ for a lot of years.

6. After she g___________ from the university, she became a flight a_________.