69. They buried their ______(财宝) in a deserted house.

68.Believe it or not, _______(旅行) was slow and danger in the old times.

67.________(运送) these goods by lorry is practical in price.

66. There is a shortage of _________(受训) nurses..

65．________ (交通) in large towns is very busy.

64．He is in the furniture ________(贸易).　 Trade was good last year.

63．The farmers went on working by the light of the ________(拖拉机).

62．Follow the _______ (足迹) left by the bears, you'll find them.

61．Each time he comes back from journey, he will buy his son some ___(玩具) bears.

60．Entering the district, you'll see many tall _________(塔) here and there.