Điền giới từ
điênf giới tư
21. They were quite excited ....... the match.
22. We weren't very impressed ........ his appearance.
23. I was very angry ....... them ......... making so much noise.
24. He felt sorry ...... the children.
25. The letter Ba wrote was full ....... mistakes.
26. My town is famous ........ green bean cakes.
27. I'm not ashamed ...... what I did. In fact, I'm quite proud ..... it.
28. These days everybody is aware ...... the danger of smoking.
29. The station platform is crowded ......... people.
30. I'm tired ....... doing the same thing everyday