13.She is a better speaker than（ ）in the class.

42.Jack（ ）from home for two days now, and I am beginning to worry about his safety.

41.Agriculture is the country’s chief source of wealth, wheat（ ）by far the biggest cereal crop.

65.Scientific research results can now be quickly（ ）to factory production.

64.The old couple will never（ ）the loss of their son.

63.During the summer holiday season it is difficult to find a(n)（ ）room in the hotels here.

62.During the reading lesson, the teacher asked students to read a few（ ）from the novel.

61.The new colleague（ ）to have worked in several big corporations before he joined our company.

60.The（ ）family in Chinese cities now spends more money on housing than before.

59.The teacher（ ）expects his students to pass the university entrance examination.

58.There has been a（ ）lack of communication between the union and the management.