21. The factory used 65% of the raw materials£¬ the rest of which             saved for other purposes.

A. is                B. are             C. was            D. were

22. It suddenly hit me             difficult life was for women at that time.

A. what a            B. what            C. how            D. how a

23. If a book is             £¬  it will surely             readers.

A. interested£»interest                         B. interesting£»be interested

C. interested£»be interesting                    D. interesting£»interest

24. The fantastic shop signs             on the windows are designed and painted by students from Class One.

A. being hung         B. hanging          C. hang           D. are hung

25. Traffic is             on roads into the city. Let’s take the metro instead.

A. building up         B. carrying on       C. dashing         D. swinging