l.  _____the baby   __     ( stop) crying yet?
2. She        _ (put) on her coat and went out.
3. I'm sorry to   __       (keep) you waiting for a long time. I was really busy.
4. It       _  (take) him half an hour to finish his homework yesterday.
5. Mr. Yu  __      (teach) us maths since 1982.
6. Last night she    __      ( want) to see the film very much , but she couldn't get a ticket.
7. Mike     __     (visit) several places since he came to Beijing.
8. We     _     ( know) each other since our boyhood (少年时代) .
9. Wei Fang isn't here. She    _    (go) to the reading room.
10. Zhang Hong     _   (make) marry friends so far.