一、课后练习：

1. One-third of thearea _____ covered with green trees. About seventy percent of the trees _____been planted.

2. The number of teachers in our college _____ greatly increased last term. Anumber of teachers in this school _____ from the countryside.

3. What _____ the population of China? One-third of the population _____ workershere.

4. Not only he but also we _____ right. He as well as we _____ right.

5. What he’d like _____ a digital watch. What he’d like _____ textbooks.

6. He is one of the boys who _____ here on time. He is the only one of the boyswho _____ here on time.

7. Either you or he _____ interested in playing chess. _____ you or he fond ofmusic at present?

8. Many a professor _____ looking forward to visiting Germany now.  Manyscientists _____ studied animals and plants in the last two years.

9. A knife and a fork _____ on the table. A knife and fork _____ on the table.

10. Her family _____ much larger than mine four years ago. Her family _____dancing and singing when I came in last night.

11. How and why Jack came to China _____ not known. When and where to build thenew library _____ not been decided.

12. Now Tom together with his classmates _____ football on the playground.

13. Two hundred and fifty pounds ______ too unreasonable a price for asecond-hand car.

14. All but Dick _____in Class Three this term.

15. Soon after the earthquake, every man, woman and child _____ about it.

16. We each _____ strong points and each of us on the other hand _____ weakpoints.

17. My friend and classmate Paul _____ motorcycles in his spare time.

18. There _____ a pen, two pencils, and three books on the desk.

19. The factory, including its machines and buildings, _____ burnt last night.

20. Climbing hills _____ of great help to health.

21. Time and tide _____ for no man.

22. The injured in the tsunami _____ good care of by some medical teams.

23. It is not J. K. Rowling but her works that _____ us excited.

24. On the closet _____ a pair of trousers his parents bought for his birthday.

25. Each man and each woman _____ asked to help when the fire broke out.

26. About 60 percent of the students _____ from the south; the rest of them_____ from the north and foreign countries.

27. —Is there anybodyin the classroom?

—No, the teacher, together with the students _____ to theplayground.

28. —Are these yoursheep?

—No. Mine _____ on grass at the foot of the hill.

29. Sitting at theback of the room but in front of some old men and women _____ a very shy girlwith two bright eyes.

30.Mr.Bush, togetherwith his wife and daughter _____ going to Japan next week.

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