(   ) 24. The expert has written a book        the history of Japan.

   A. about   B. on   C. over   D. in

(   ) 23. It's important        us to learn English well.

   A. for   B. of   C. to   D. by

(   ) 22. The driver hit a man        the car.

   A. in front of   B. in the front of   

    C. on front of   D. on the front of

(   ) 21. Japan is        the east of China and        the east of Asia.

   A. in,to   B. to,in   C. on,to   D. at,in

(   ) 20. It is wrong to laugh        people when they are        trouble.

   A. at,in   B. over,in   C. with,on   D. of,in

(   ) 19. The basket was filled        sand.

   A. of   B. with   C. by   D. in

(   ) 18. The big meeting room is full        people.

   A. with   B. of   C. off   D. by

(   ) 17. Have some medicine and you'll be all right        supper time.

   A. for   B. by   C. at   D. since

(   ) 16. He turned        the wallet to the policeman.

   A. in   B. to   C. over   D. off

(   ) 15. Here's a letter        you.

   A. at   B. for   C. of   D. to