15.Protocol was（ ）enabled him to make difficult decisions without ever looking back.

55.In winter drivers have trouble stopping their cars from（ ）on icy roads.

54.The motorist had to（ ）to avoid knocking the old woman down in the middle of the road.

53.When you’re driving on a motorway, you must obey the signs telling you to get into the right（ ）.

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

51.（ ）at in this way, the present economic situation doesn’t seem so gloomy.

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

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

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

47.I was very much put（ ）by Mark’s rude behavior; it really annoyed me.

46.My mother can’t get（ ）because she has rheumatism.