1.Taking pictures___ very interesting.

　　A. is B. are C. to be D. be

　　2.______ the bad news made him cry.

　　A. Hear B. Heard C. Hearing D. Is hearing

　　3._____ a desert had always been a risk adventure.

　　A. Being crossed B. Having crossed C. Crossing D. To have crossed

　　4.Before he came , I’d finished _______ the whole book.

　　A. to read B. to have read C. reading D. read

　　5. I always enjoy ____ to popular music at night.

　　A. to listen B. listening C. that I can listen D. if I can listen

　　6.We are considering ________ a trip around the island.

　　A. take b. to take C. to be taking D. taking

　　7.I hope you don’t mind ____ at your newspaper.

　　A. I look B. my looking C. I looking D. my to look

　　8.When a man’s heart stops ______ , he dies.

　　A. to beat B. beating C. beat D. beaten

　　9.I can’t help _______ he is still alive.

　　A. thinking B. think C. to think D. thought of

　　10.So far as I am concerned , I prefer reading ________ .

　　A. than meat B. for joy C. instead of sleeping D to drinking

　　11. It goes without _______ that knowledge is important.

　　A. talking B. telling C. saying D. mentioning

　　12. we are looking forward ______ our friends next week.

　　A. to see B. to seeing C. to be seeing D. shall see

　　13.He spent a lot of money _____ books and magazines.

　　A. buy B. buying C. to buy D. bought

　　14.The silkworm is an insect worth _____.

　　A. to know B. knowing C. to be known D. being known

　　15.She went out without ______ good-bye to us.

　　A. say B. to say C. saying D. being said

　　16.The curious student kept on _______ questions.

　　A. asks B. asking C. to ask D. asked

　　17.He is such a strange person; there’s _____ what he’ll do next.

　　A. no knowing B. not to know C. not known D. being unknown

　　18.When she heard the bad news, she burst______.

　　A. into crying B. out to tears C. crying D. out crying

　　19. You must never cross the street without ______ the light to turn green.

　　A. waiting B/ to wait C. waiting for D. to wait for

　　20. Scientists succeed _____ protein out of old newspapers.

　　A. to make B. at making C. making D. in making