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

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

12.Among the four sentences below, Sentence（ ）expresses the highest degree of possibility?

11.How can I concentrate if you（ ）continually（ ）me with silly questions?

80.A couple of young people were （giving out） leaflets in front of the department store. The underlined part means（ ）.

79.These issues were discussed （at length） during the meeting. The underlined part means（ ）.

78.The local newspaper has a（ ）of 100,000 copies a day.

77.His （fertile） mind keeps turning out new ideas. The underlined part means（ ）.

76.To （mark） its one hundredth anniversary, the university held a series of activities including conferences, film shows, etc. The underlined part means（ ）.

75.The university consistently receives a high（ ）for the quality of its teaching and research.

74.During the economic crisis, they had to cut back production and（ ）workers.