23. As previously suspected , the inhabitants of the region had been hunter-gatherers living relatively ( ) lifestyles .

56、When you're driving on a motorway, you must obey the signs telling you to get into the right ( )

55、Many people are ( ) to insect bites, and some even have to go to hospital.

54、( ) at in this way, the present economic situation doesn't seem so gloomy.

53、Firms that use computers have found that the number of staff ( ) is needed for quality control can be substantially reduced.

52、All of us would have enjoyed the party much more if there ( ) quite such a crowd of people there.

51、You ( ) Jim anything about it. It was none of his business.

50、I was very much put ( ) by Mark's rude behavior; it really annoyed me.

49、My mother can't get ( ) because she has rheumatism(风湿病).

48、There ( ) nothing more for discussion, the meeting came to an end half an hour earlier.

47、Do help yourself to some fruit,( ) you?