32.He apologized_having to leave so early.

35.Jenny was looking for a seat when, luckily, a man_and left.

42.The young man was not found to be illiterate until_.

63. 不管发生什么 , 他们都将完成这个试验。

26.He_to see you yesterday, but he had an important meeting to attend.

28.We had the machine_just now.

31.There is not much news in today’s paper_？

27.I have no choice but_his invitation.

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

65. 很难记住你不感兴趣的信息。

57. 金属有许多有用的特性 , 其中强度是最重要的。

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