45. Mr. Smith is considering ______ a computer, which is considered ______ a great help in our work and study.

A. to buy; to be　　　 B. buying; to be　 　C. to buy; being　　　 D. buying; being

44. -Do you know the answer ______ the question?　

　-Yes, of course. The question is easy _________.

A. of; to answer　　　　 B. of; to be answered　 　C. to; to answer 　 　　D. to; to be answered

43. A11 means _______ out but unsuccessful. We have to finish the task______.

　 　A. has been tried; in this way　 　　B. have been tried; by this means　

　　 C. has been tried; in this means 　　　D. are tried; by this means

42. Although the working mother is very busy, she still 　　　　a lot of time to her children.

　 　A. spends　　　　　 B. devotes　　　　 C. offers　　　　 D. provides

41. My father served in the army in _______ when he was　in _____.

　 A. 1950’s; twenties　 　　　　　B. the 1950s; his twenties　 　

C. the 1950’s; the twenties 　　　D.1950’s; the twenties