题目：

21.  This pair of shoes ____made in Nanjing.

    A.is    B. are    C. have been    D. had been

22. No one except my parents _____anything about it.
    A.     know     B. knows     C. is knowing  D. have known

23. A number of students _____from the south.
    A. are    B. is    C. have    D. has

24. The number of students from the north ____small.
    A.are    B. is    C. have    D. has

25. Writing stories and articles _____what I enjoy most，
    A.is    B. are    C. was    D. were

26. His “Selected Poems” _____first published in 1965.
    A.were    B. was    C. has been   D. are

27. Miss Smith is a friend of ______.
    A. Mary‘s mother’s          B. Mary‘s mother
   C. Mother’s of Mary         D. Mary mother‘s

28. A good deal of money ____spent on books.
    A.     have       B. has           
    C. have been        D. has bee

29. On the wall _____ two large portraits.
    A.     hangs     B. hang         C. hanged      D. hanging

30. _____turn green in spring.
    A. Leaf   B. Leafs            C. Leave              D. Leaves

【答案解析】

  21-25 ABABA        26-30 BADBD