70. John always feels sluggish first thing in the morning. The underlined part means ( ).

54、They overcame all the difficulties and completed the project two months ahead of time,
( ) is something we had not expected.

53、It is futile to discuss the matter further, because ( ) going to agree upon anything today.

52、( ) I like economics, I like sociology much better.

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

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

49、Your ideas, ( ) , seem unusual to me.

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

47、Who ( ) was coming to see me in my office this afternoon?

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

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