從A、B、C、D四個選項中,選出可以填入空白處的最佳選項。

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

　　A. are; have B. is; has

　　C. is; have D. are; has

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

　　A. was; is B. was; are

　　C. were; are D. were; is

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

　　A. is; are B. are; are

　　C. is; is D. are; is

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

　　A. are; are B. are; is

　　C. is; is D. is; are

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

　　A. are; are B. is; is

　　C. is; are D. are; is

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

　　A. has come; have come

　　B. have come; has come

　　C. has come; has come

　　D. have come; have come

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

　　A. are; Are B. is; Are

　　C. are; Is D. is; Is

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

　　A. is; have B. is; has

　　C. are; have D. is; are

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

　　A. is; is B. are; are

　　C. are; is D. is; are

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

　　A. were; was B. was; were

　　C. was; was D. were; were

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

　　A. is; has B. are; has

　　C. is; have D. are; have

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

　　A. play B. are playing

　　C. plays D. is playing

　　13. Two hundred and fifty pounds _____ too unreasonable a price for a second-hand car.

　　A. is B. are

　　C. were D. be

　　14. All but Dick _____ in Class Three this term.

　　A. are B. is

　　C. were D. was

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

　　A. were talking B. was talking

　　C. talk D. talks