18.　 Each of the students _____ a Chinese-English dictionary.

　　 A. have　　　 B. has　　 C. there is　　 D. there are

17. Mathematics ____the language of science.

　　 A. are　　　　 B. are going to be　　　 C. is　　　　　　 D. is to be

16. Half of his goods ____ stolen the other day.

　　 A. are　　 B. were　　 C. is　　 D. was

15. That they were wrong in these matters _____ now clear to us all.

　　 A. is　　 B. was　　 C. are　　 D. were

14. Although the first part of the book is easy， the rest ______.

　　 A. are difficult　　　　　　　　　　　

　　 B. has proved difficult　　

　　 C. is supposed difficult　　　　　　

　　 D. have been found difficult

13. When and where to build the new factory ____yet.

　　 A. is not decided　　　　　　　　 B. are not decided

　　 C. has not decided　　　　　　　 D. have not decided

12. Not only Tom but also his wife ____fond of watching television.

　　 A. are　　 B. were　　 C. be　　 D. is

11. It ____I who _____leaving for London.

　　 A.is…is　 B. am…is　　 C. is…am　　 D. am…am

10. Mr Smith， together with his children， ____arrived.

　　 A.are　　 B. has　　 C. is　　 D. have

9. About 20 percent of the work ____done yesterday.

　　 A. are　　 B. is　　 C. were　　 D. was