II. Complete each sentence using a word or a phrase.
1. One person I always .............. at when I see him on TV is Mr.Trung.
2. Yes, John is here on vacation , .............. not on business.
3. If we didn't try our best to ................. our rain forests would be destroyed.
4. There is a danger of accidents as he usually drives .................
5. The bill must ............ by Saturday , or electricity will be cut off.
6. My toothache is getting worse. I wish my doctor .............. some advice now.
7. Samuel Clemens , whose ......... is Mark Twain , is a famous American writer.
8. The children are suspiciously quiet . What ............. in the class ?
9. ............... computer is very helpful to us . Working with it too much can be harmful to our health.
10. What did you do last night ? We did nothing ............ music.