【推荐1】Underline the subjects of the following sentences.
1. During the 1990s, American country music was very popular.
2. We often speak English in class.
3. One-third of the students in this class are girls.
4. To swim in the river is a great pleasure.
5. Smoking does harm to the health.
6. The rich should help the poor.
7. When we are going to have an English test has not been decided.
8. It is necessary to master a foreign language.

【推荐2】汉译英
1. 对……方便 _______________
2. 大量 _______________
3. 受……欢迎 _______________
4. 想出,想到 _______________
5. 被允许做某事 _______________
6. 回到 _______________
7. 幸亏 _______________
8. 享受……的好处 _______________
9. 尝试不同的方法 _______________
10. _______________ n. (车辆等的)停放
11. _______________ adv.因此;由此
12. _______________ n.小径,小道
13. _______________ vi.消失,不见
14. _______________ n.跟踪
15. _______________ n.目的地;终点