4.In this country it is required that any　 one　 who　 has　 recently　 come　 here pays taxes.

3. After　 she　 had　 returned　 home　 and　 began　 to　 prepare　 supper, she　 remembered the invitation to eat at Jim's house.

2.Carl is very homesick. I hope having his mother here for a few days　　 makes him happy.

1.The meeting was interesting to some people and to me it was tiring.

50.On land many objects prevent sound _______ very far.

　 A.to travel　 B.travel　 C.from travelling　 D.to travelling

Proof reading:　 One Man's Meat Is Another Man's Meat,Too

　　 When Mr Woolf left university, he got a good job

in a big company, but after he has been there for a　　　　 1._________

few years, he decided to have some change. He put　　　　　 2._________

an ad. in several newspapers, said what experience he　　　 3._________

had had,describing the kind of a job he had at that　　　　 4._________

time, and the kind he would like have. One of the　　　　　 5._________

answer he got was from another man who was looking　　　　 6._________

for a job either. This man wrote to him, "Dear Sir,　　　　 7._________

when you will get a new job, please be kind enough to　　　 8._________

give my name and address for your present employer雇主,　　 9._________

because I have been trying to find a job as yours for　　 10._________

a long time."

Point out the only one possible mistake in each of the following sent.:

49.By _____, water can be changed into gas. (参考: If ___, water can be changed into gas.)

　 A.heating　 B.being heated　 C.having heated　 D.heated

48.Bebecca was unhappy for _____ the first chance to go abroad.

A.not having been given　 B.not having given

　 C.not giving　　 D.having been given

47.He attended the party without _______________.

　 A.invited　 B.inviting　 C.having invited　 D.being invited

46.________ provides us with essential nutrients(营养),while _________　　 provides us with oxygen.

A.To eat; breathing　　 B.Eating; to breathe　

C.Eating; breathing　　 D.Eaten; breathed

45.This bike is not worthy ___________.

　A.to be repaired　 B.of repairing　 C.to repair　 D.repairing