264.There has been an increasing number of _______ in primary schools in the past few years.

39.Professor Johnson is said__________some significant advance in his research in the past year.

38.The three men tried many times to sneak across the border into the neighbouring country,__________by the police each time.

37.After__________seemed an endless wait, it was her turn to enter the personnel manager's office.

36.You________Mark anything. It was none of his business.

35.________enough time and money, the researchers would have been able to discover more in this field.

34.His strong sense of humour was________make everyone in the room burst out laughing.

33.The Clarks haven't decided yet which hotel________.

32.________he needed money for a new car, he decided not to borrow it from the bank.

31.Language belongs to each member of the society, to the cleaner________to the professor.

30.The children prefer camping in the mountains________an indoor activity.