21. —茶叶在中国什么地方生产？

--嗯，在中国很多不同地方。 

—Where_tea_in China?

—Well，_many  different_。

(    ）20.    If the question_incorrectly,_question    will    be    given to you.

A. answers，another    B.    answers，other

C. is answered,another    D.    is answered，other

(    )19. The classroom_by the students every day.

A. cleans    B.    is cleaning    C.    does clean    D.    is cleaned

(    )18. —Do you often plant trees in spring?

—Yes. Many trees_in    our    village every year.

A. plant    B.    planting    C.    are planted    D.    are planting

(    )17. What did you see_the    art    and science fair?

A. by    B.    at    C.    about    D.    with

(    )16._is    the    painting    made    from?

A. What    B.    Why    C.    Where    D.    How

13.因……而闻名_ 14.茶树_

15.山坡_

10.用……造成/制成（原材料不易看出 ）_

11.因……而著名/出 名_ 12.在过去；以往_

7.—架模型飞机_

8.—幅美丽的画_ 9.树叶和草 _

4.在……生产或制造_ 5.艺术和科学博览会_

6.环（境）保（护）_