4.　　 请根据第二段内容，将最后一个句子补充完整。

The more we burn,_____________________________________________

3.　　 请将第一段中的划线句子翻译成汉语。

2.　　 What are fossil fuels?(同上)

1.　　 What problem can global warming cause?(根据短文内容回答问题)

_________________________________________________________

79. What can you do for $380 according to the passage? 　　　　　　　　　　　　　　

78. How many doctors and nurses has ORBIS taught?　 　　　　　　　　　　　　　　　

77. ORBIS’ goal is to　 　　 __________

76. Both rich and developing countries have the knowledge of helping blind people.[　　 ]