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

49.（ ）I like economics, I like sociology much better.

48.Time（ ）, the celebration will be held as scheduled.

47.The opening ceremony is a great occasion. It is essential（ ）for that.

46.Your ideas,（ ）, seem unusual to me.

45.–— Does Alan like hamburgers?—— Yes. So much（ ）that he eats them almost every day.

44.Who（ ）was coming to see me in my office this afternoon?

43.Above the trees are the hills,（ ）magnificence the river faithfully reflects on the surface.

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.