68.If there is no other way to save a（ ）person in a tall building on fire, fire fighters may spread a net into which the person can jump.

57.Most people were greatly shocked by the news（）the famous company had gone bankrupt.

56.The company has decided to donate funds to charities,（ ）helps to promote its image.

55.I wish I could（ ）you somehow for your kindness.

54.Her father will never（ ）of her going to study in the United States alone.

53.He went to the dance last night but couldn’t find a（ ）because of his strange clothes.

52.They（ ）cattle mainly for the international market.

51.The Foreign Minister made an excellent（ ）on the current international situation.

50.After living in Paris for fifty years he returned to the small town（ ）he grew up as a child.

49.Mrs. Green became a teacher in 2000. She will（ ）for twenty years by next summer.

48.Children under eighteen are not permitted to see such kind of books（ ）bad for their mental development.