7._____ _____　 _____　 _____(在……过程中)our conversation I know Bob has been in prison.

6._____　 ______　 ______　 _______(掌握一门外语)is not an easy job for the beginners.

5.The poor farmer felt tired _______　 _______　 _________　 __________(因缺乏睡觉).

4. ______　 ______　 ______　 ______(没有必要)to talk about this boring subject.

3.This is a big team, ______　 _______­­­(由……组成) two hundred men and twenty women.

2.We want to_____　 _____　 ______(缓解她的心中忧虑)by showing her around the big campus.

1.Betty ____　 ____　 _____(得出结论)about how the pyramids were built from the facts.

10. A: Take clothing off the burned area unless it is stuck to the burn.

　 B: Take clothing off the burned area if____ ____ ____stuck to the burn.

9. A: I’m proud of what I did

　B: I ____ ____in what I did.

8. A: You should fix your attention on your study while in the classroom.

　 B: You should _____ _____ your study while in the classroom.