2. 参观者必须下午四点离开公园。

1. 既然你已经知道这件事了，我不想再谈了。

5. The pain 　　　　already 　　　　after taking the medicine.

4. The cuckoo(杜鹃)　　　　 　its eggs in other birds’nest.

3. The old man 　　　　his two sons for food and clothing.

2. Salt 　　　　easily in water.

lessen/dissolve/depend on/prevent ...(from ...)/lay

1. Nothing on earth can　　　　 　me 　　　　loving her.

10. There is an 　　　　(气氛) of peace and calm in the country, quite different from that of a big city.

9. The boss never shouts at his staff in the　　　　 (在场) of others.

8. This kind of plant only 　　　　(存在) in Africa.