A. 错误 B. 正确 满分：2 分
4. The criminal didn't realize the value of freedom until he had lost it.
A. 错误 B. 正确 满分：2 分
5. It's better to avoid to drive downtown during the rush hour.
A. 错误 B. 正确 满分：2 分
6. Professor Rudolph was absent and we had the afternoon out.
A. 错误 B. 正确 满分：2 分
7. You'd better not to drink the water until it has been boiled.
A. 错误 B. 正确 满分：2 分
8. Our president will hold a special party at May Flower Hotel tonight at your honor.
A. 错误 B. 正确 满分：2 分
9. The hotel which I stayed during the vacation was rather poorly managed.
A. 错误 B. 正确 满分：2 分
10. I prefer to live in the country rather than live in a city.
A. 错误 B. 正确 满分：2 分