78.As soon as he opened the door, a（ ）of cold air swept through the house.

67.There are still many problem ahead of us, but by his time next year we can see light at the end of the（ ）.

66.—— Why are you staring?—— I’ve never seen（ ）tree before.

65.Children who stay away from school do（ ）for different reasons.

64.He asked me to lend him some money, which I agreed to do,（ ）that he paid me back the following week.

63.（ ） you（ ）further problems with your printer, contact your dealer for advice.

62.The meeting was put off because we（ ）a meeting without John.

61.What’s the chance of（ ）a general election this year?

60.That was not the first time he（ ）us. I think it’s high time we（ ）strong actions against him.

59.Do you know Tim’s brother? He is（ ）than Tim.

58.I know he failed his last test, but really he’s（ ）stupid.