Chọn đáp án đúng để hoàn thành câu sau đây:
1. By the year 2000, many people currently employed ................... their jobs.
2. The first question must ................... before you attempt the others.
3. How do you account ............... this discrepancy?
4. I don't remember ............... the front door when I left home this morning.
5. The labor union was determined to fight on .............. they got some satisfaction.
6. If only he .............. told us the truth in the first place, things wouldn't have gone so wrong.
7. This film is really sad. I think ..............
8. The tenant is liable ............... damages.
9. ................. was debated, the more people became involved.
10. He had to leave early, ............. he?
11. The younger you are, ............... it is to learn.
12. ................ electricity you use, ................ your bill will be.
13. His salary was commensurate ................... his abilities.
14. The lab is .............. from the bus stop than the library.
15. Sound comes in waves, and the higher the frequency, ....................
