71. We shouldn't t_____ waste paper everywhere. It's our duty to keep our city clean.                 

72. The temperature will fall below zero at night in winter in the n______ of China.

73. The big earthquake in Japan caused over ten thousand people dead and about ten thousand people m________.

74. People who are friendly and helpful make it a lot e______ to get along with in a new place.         

75. Tracy is always very busy on weekdays, so she can only watch TV t_______ a week, on Saturdays and Sundays.

76. My h_______ are reading, singing and swimming.

77.The story i_______ is interesting, but it's a little difficult for children..                           

78. Do you think this kind of water is s_______ for drinking?                                     

79. Don't make any n_______. The baby is sleeping.       

80. There is someone k_______ at the door. Go and see who it is．                              

71. We shouldn't t_____ waste paper everywhere. It's our duty to keep our city clean.                 

72. The temperature will fall below zero at night in winter in the n______ of China.

73. The big earthquake in Japan caused over ten thousand people dead and about ten thousand people m________.

74. People who are friendly and helpful make it a lot e______ to get along with in a new place.         

75. Tracy is always very busy on weekdays, so she can only watch TV t_______ a week, on Saturdays and Sundays.

76. My h_______ are reading, singing and swimming.

77.The story i_______ is interesting, but it's a little difficult for children..                           

78. Do you think this kind of water is s_______ for drinking?                                     

79. Don't make any n_______. The baby is sleeping.       

80. There is someone k_______ at the door. Go and see who it is．                              

补全对话。从方框中选出适当的句子补全对话。

A: Lucy, why are you going out   1 ?

B: That’s the sound of a truck collecting rubbish.

A: Do you mean you have to take the rubbish to the truck?

B: Yes. You know   2  is our duty. We should help protect the environment.

A: I agree.  3 , we must do something around the neighbourhood.

B: Sure. It is our duty to keep the environment clean and tidy. If we make a contribution to protecting the environment,  4 

A: That’s right. We mush try our best to make our country more beautiful. So we should   5  to improve the environment.

A. taking care of the environment B. the world will become much more beautiful C. do something useful D. after hearing the music E. Wherever live