A: Tom, would you like to go birdwatching in Beihai Park with us?

　 B: 　81 　When are we going?　　　　　　　　　　　　　　　　　

A: This Sunday,　 82　 　　　　　　　　　　　

B: Yes, I am.　 83　　　 　　　　　　　　　　　　　　　　　　　　　　　　　　　

　 A: It starts at 9:00 a.m. and finishes at 3:00 p.m.　　　　

　 B: OK. Where shall we meet?　　　　　　　　　　　　

　 A:　 84 　Can you remember?　　　　　　　　　　　　　　　　　　

　 B: Of course. 　85

A: Good idea.

81._________ 82._________ 83._________ 84.__________ 85._________

80. What are they doing now? (用this time yesterday替换时间状语)

　 What _______ they _______this time yesterday?

79. The box weighs 100 kilograms. (对划线部分提问)

　 _______ _______ does the box weigh?

78. She didn’t come to the party because of the heavy rain. (对划线部分提问)

　 ________ _______ she come to the party?

77. Nature reserve can provide food and shelter for wildlife. (同义句)

　 Nature reserve can provide________ _________ food and shelter.

76. The boy did the work on his own. (同义句)

　The boy did the work ________ _________.

75.一场洪水把村庄冲走了。

A flood　 _________ the village _________.

74.桑迪没吃早饭就匆忙上学去了。

Sandy was in a __________ to school _________ eating breakfast.

73.许多人不明白湿地的重要性。

Many people don’t understand the ___________ of the___________.

72.他不做完作业是不会睡觉的。

　He________ go to sleep until he finishes _________ his homework.