2. 　　　　　　　　　　　　wild animals when you go up the hill.

1. You must 　　　　　　　　　　　about your health.

2. Once the riders are stopped, that they will have to pay money is　　　　　 　.

B. be careful/take care/look out

A. certain/sure

1. -Would you please turn down the radio a bit?

-　　　　　　　 .

10. Do you take seriously his　　　　 (预测) of a government defeat?

9. When we meet with difficulties, we should remain 　　　　(乐观的) instead of being pessimistic.

8. All of them worked very hard and　　　　　 　(最终地) they finished their work on time.

7. The football player was wounded. The team leader had to allow an 　　　　(可替换的) player to join in the match.

6. Organ transplantation not only needs exact　　　　 　(外科手术), but also needs steady source of organ.

5. Fishing is a common r　　 when people want to relax.