45.　 -Could you let me know　　 yesterday?

- Because the traffic was heavy.

A. why did you come late　　　　　　 　B. why you came late

C. why do you come late　　　　　　　 D. why you come late

44. With the help of the computer, information can 　　　　every corner of the

world quickly.

A. get　　　　　　 B. reach　　　　 C. arrive　　　 D. return

43. Jim wants to be a great painter. Sometimes he draws a horse in many ways ________he is ready to paint.

A. until　　　　　 B. so　　　　　　 C. after　　　　 D. before