50.My sister is used to ()with all the window’s open.

45.After being tested in many ways， this newly-designed machine will ()in the near future.

44.Most people prefer ()money to ()it.

43.Public attention at the moment is ()the problem of industrial relations.

42.He swallows his words so much that I can never ()what he is saying.

41.Important people don’t often have much free time as their work ()all their time.

40.Theory is based on practice and ()serves practice.

39.He’s English ()although he was born in France.

38.He failed to supply the facts relevant ()the case i question.

37.Doesn’t Alice show a great deal of anxiety ()her exams?

36.I make notes in the back of my diary()things to be mended or replaced.