78.They are all a________ workers who will be awarded for their hard work.

77. Tony got praise from his teacher　 today， for he usually 　　　　　　　　 (表现) himself at school.

76. She had difficulty ___(发表) a speech before a large audience.

75. 她主张应该让野生动物留在野外生活，而不能用于娱乐或广告。

She has ____ that wild animals should be left in the wild and not used for ____ or advertisement.

74. 随着时间的推移，食物中的这些化学成分会在人体中堆积。

These chemicals in the food supply 　　　　　　　　　in people's bodies over time.

73.不幸的是他的父亲去世了，整个家庭状况更糟了。

____ his father died, ____ his family even worse off.

72.昨天，我和另一个学生代表我们学校的学生会，到首都国际机场迎接今年的国际学生。

Yesterday,another student and I, ____ our university's student　　　 ，went to the Capital International Airport to meet this year's international students.

71.国内所有景区都是按照亚瑟王和圆桌骑士生活的时代复制的。

Every area of the park is ____ ____ life in the days of King Arthur and the Knights of the Round Wizard.