13. The scientists are searching for the s______ of the river.

12. We ___________　 ________ (将要去)for Beijing tomorrow.

11. Finally they were __________(说服) to cycle around China.

10. I am not ________ _______(熟悉) the city, for this is my first visit here.

9. He is a d__________ person. If he d__________ to do something, he will do it well.

8. The little boy said nothing because he was not b____ enough to be against his father.

7. In the past, the villagers t__________ their goods by goat not by truck.

6. The music sounds so good that I want to r_____ it from the radio.

5. Excuse me, what is the f_____ to Paris? Is $ 10 enough?

4、Most students keep a _____ (日记) of their everyday life.