5. He ____________ to us how to use the computer.

4. You can _____________ my office at any time, if you like.

3. It’s too late to go outside. _______________, it’s beginning to rain.

2. Huang Shiren shouted to Yang Bailao: “You must ______________ all your debts before the end of the year.

1. He dressed up as a cowboy, but I still ________________ him at the first sight.

13.Each time we celebrate a festival it changes a little and in that way we __________ our culture __________.

练习三(Unit 15)

12.--- ____________________, we should make a decision as soon as possible.

--- I don’t agree with you.

11.If a person is ____________________, he or she is called “April fool!”

10. People would ____________________ to celebrate their harvest.

9.　 _____________, they won the contest through their own efforts.