35. He is not at home all day. Where do you think_______?

A. he has gong 　　　B. did he go 　　　　C. has he gone　 　　D. he did gone

34. I can hardly imagine peter ____ across the Atlantic Ocean (大西洋)in five days.

A. sail 　　　　　　B. to sail 　　　　　　 　　C. sailing　 　　　D. to have sailed

33. The company had about 20 notebook computers but only one- third ______ used regularly. Now we have 60 working all day long.

A. is 　　　　　　　 　　　　B. are 　　　　　 　　　　C. was 　　　　　 　　　　D. were