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.