85．While watch TV ,we heard the doorbell ring.

84．It was not until midnight when he went back home after the experiment .

83．I appreciate that if you could give me a hand .

82．He was pleased with their warmth welcome.

81．As is known to us all that the economy of China is getting better and better.

76．The teacher 　　　　　(评估)the performance of each student。

77 I am quite willing to accept the　 　　　　　　　(后果).

78 More and more people can’t bear the 　　　　　　　( 压力) of　 modern life.

79 I say, waiter. the soup is too　　　　　 ( 咸的)　　

80What is your　　　　　 ( 目标) in life?