35. Just as the value of a telephone network increases with each new phone _____ to the system, so does the value of a computer system increase with each program that turns out.

　A. adding　 B. to have added 　C. to add　 D. added

34. I like the book _____ by Tom.

　A. written　 B. be written 　C. writing　 D. to write

33. The dictionary still _____ where I _____ it a moment ago.

　A. lies； laid 　B. lied； lay 　C. laid； laid 　D. lies； lay

32. He will be late _____ he can catch the 10:30 train.

　A. if 　B. as if 　C. if not　 D. even if

31. Workers in this factory are paid _____ the day.

　A. on 　B. in 　C. by　 D. with

30. Mrs. White found her husband surrounded by letters and papers and _____ very worried.

　A. look 　B. looks 　C. looking 　D. to look