根据句意, 用括号内所给动词的适当形式填空. (必要时加助动词或情态动词)

1. Mr Zhang ______ (teach) us English three years ago.

2. Peter turned off the computer after he finished ______ (write) an e-mail.

3. —Where's Miss Wang?

    —Look, she ______ (talk) with the students.

4. Mr Liu isn't here now．He ______ (go) to Beijing.

5. The children will go to the zoo if it ______ (not rain) this Saturday.

6. There ______ (be) a meeting in our school tomorrow afternoon.

7. Mr Green ______(watch) TV at this time last night.

8. You'd better ______ (eat) less food before you go to bed.

9. My teacher told me that light ______ (travel) much faster than sound.

10. English ______ (speak) by many people in the world.