38. _________ in the regulations that you should not tell other people the password of your e-mail account.

A. What is required　 　　　 B. What requires　　　　　　 C. It is required　　　　　　　 D. It requires

37. At last, we found ourselves in a pleasant park with trees providing shade and _______ down to eat our picnic lunch.

A. sitting　 　　　　　　　　　　　　　 B. having sat　　　　　　　　　 C. to sit　　　　　　　　　　　　　　 D. sat

36. More and more people are signing up for Yoga classes nowadays, ________ advantage of the health and relaxation benefits.

A. taking　 　　　　　　　　　　　　　 B. taken　　　　　　　　　　　　　 C. having taken　　　　　　　 D. having been taken

35. It was unbelievable that the fans waited outside the gym for three hours just _______ a look at the sports stars.

A. had　 　　　　　　　　　　　　　　　 B. having　　　　　　　　　　　　 C. to have　　　　　　　　　　　　 D. have

34. He transplanted the little tree to the garden _______ it was the best time for it.

A. where　　 　　　　　　　　　　　 B. when　　　　　　　　　　　　　 C. that　　　　　　　　　　　　　　　 D. until

33.______ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.

A. Put　 　　　　　　　　　　　　　　　 B. Putting　　　　　　　　　　　　 C. Having put　　　　　　　　 D. Being put

32. He got well-prepared for the job interview, for he couldn’t risk _______ the good opportunity.

A. to lose　 　　　　　　　　　　　　 B. losing　　　　　　　　　　　　　 C. to be lost　　　　　　　　　　 D. being lost

31. Professor Smith, along with his assistants,______ on the project day and night to meet the deadline.

A. work　 　　　　　　　　　　　　　　 B. working　　　　　　　　　　　 C. is working　　　　　　　　　 D. are working

30. More than a dozen students in that school _______ around to study medicine last year.

A. sent　 　　　　　　　　　　　　　　 B. were sent　　　　　　　　　　 C. had sent　　　　　　　　　　 D. had been sent

29. There was a loud scream from the backstage immediately after the concert ended, ______ ?

A. wasn’t there　 　　　　　　　　 B. was there　　　　　　　　　　 C. didn’t it　　　　　　　　　　　　 D. did it