23.Jack worked late into the night, _he had not finished even half of the job.

19.If you are walking away from a clock tower, you will hear the ticking of the clock fade to point_it cannot be heard.

17.I was very tired.Otherwise, I_ the theatre with you for the new film.

33.She missed the train because she had been_the traffic jam.

30.California relies heavily on income from fruit crops, _.

32.He apologized_having to leave so early.

20._suggestions you make, he will turn a deaf ear to them.

64. 大多数人相信因特网的益处多于问题。

37.Who will most probably take care of the middle-aged Americans when they need care themselves ？

29.This stick is_that one.

18._before we leave the day after tomorrow, we should have a wonderful dinner party.

28.We had the machine_just now.