题目：

11.  It ____I who _____leaving for London.

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

12.  Not only Tom but also his wife ____fond of watching television.
    A. are     B. were    C. be    D. is

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

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

 15.  That they were wrong in these matters _____ now clear to us all.
    A. is    B. was    C. are    D. were

16.  Half of his goods ____ stolen the other day.
    A. are    B. were    C. is    D. was

 17.  Mathematics ____the language of science.
    A. are        B. are going to be       C. is             D. is to be

18.  Each of the students _____ a Chinese-English dictionary.
    A. have      B. has    C. there is    D. there are

19.  They each ____ a beautiful handkerchief.
    A. have       B. has           C. there is     D. there are

20.  Between the two rows of trees _____the teaching building.
    A. stand   B. stands         C. standing   D. are

【答案解析】

 11-15 CDABA   16-20 BCBAB