14.“I wondered if I could have a word with you” The past tense in the sentence refers to a（ ）.

46.AIDS is said（ ）the number-one killer of both men and women over the past few years in that region.

45.We’ve just installed two air-conditioners in our apartment,（ ）should make great differences in our life next summer.

44.Have you ever been in a situation（ ）you know the other person is right yet you cannot agree with him?

43.For some time now, world leaders（ ）out the necessity for agreement on arms reduction.

42.（ ）of the twins was arrested, because I saw both at a party last night.

41.She did her work（ ）her manager had instructed.

65.The（ ）of the word is unknown, but it is certainly not from Greek.

64.As the manager was away on a business trip, I was asked to（ ）the weekly staff meeting.

63.Although he has become rich, he is still very（ ）of his money.

62.His expenditure on holidays and luxuries is rather high in（ ）to his income.