45.I think travel____my knowledge of the world,so I enjoy it very much.

A.improves　　　　 B.provides　　　　　　 C.raises　　　　　 D.increases

44.______aging of the population will affect ______American society in many ways____education,medicine,and business.

A.The;/　 　　　　　B.The;the　 　　　　　　C.An;/　 　　　　　D.An;the

43.The soldiers soon reached_____was once an old temple____the villagers used as a school.

A.which;what　 　　　B.what;where　 　　　　C.where;which 　　D.what;which

42.Such things happen,Jimmy,but you___it a little better.

A.should　　　　　 B.must do　　　　　　 C.might have done　 have done

41.How did you _____to keep on for so long?It was truly hard for one like you to burden it.

A.help　　　　　　 B.expect　　　　　　 C.manage　　 　　　D.intend

40.Some companies have made the manufacturing of clean and safe products their main selling point and emphasize _____in their advertising.

A.them　　　　　　 B.why　　　　　　　　 C.how　　　　　　 D.it　

39.Throughout the world____advance has been made in science and technology is due to education which bringsforth scientists and inventors.

A.whatever　　　　 B.no matter what　　 C. however　　　　 D.whichever

38.Westlake College in Virginia will_____a laptop computer program that allows students to do school work anywhere they want.

A.start　　　　　　 B.begin　　　　　　　 C.found　　　　　 D.make

37.In character-training of children,what really _____much is what their parents say and do.

A.cares　　　　　　siders　　　　　 C.minds　 　　　　　D.matters

36.It is thought ____60 million people on the net,connected up to over 15 million computers.

A.there could be　 B.to be　　　　　　　 C.to have　　　　 D.there to be