12.She followed the receptionist down a luxurious corridor to a closed door,（ ）the women gave a quick knock before opening it.

48.Fool（ ）Jane is, she could not have done such a thing.

47.She managed to save（ ）she could out of her wages to help her brother.

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.