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Notes on the text
1.Haroun Tazieff,the Polish scientist,has spent his lifetime studying active volcanoes and deep caves in all parts of the world.波兰科学家哈罗恩·塔捷耶夫花了毕生的精力来研究世界各地的活火山和深洞。
spend+时间+in doing: 花费……时间做……事情，in可以省略
in all parts of the world: 世界各地的
2. Though he managed to take a number of brilliant photographs,he could not stay near the volcano for very long. 尽管他设法拍了一些十分精彩的照片，但他却不能在火山附近停留太长的时间。
3. Tazieff has often risked his life in this way. He has been able to tell us more about active volcanoes than any man alive. 塔捷耶夫经常冒这样的生命危险。他能告诉我们的有关活火山的情况比任何在世的人都要多。
risk his life: 冒着生命危险
any man alive: 在世的人，alive是后置定语。
Key structures
be able to: 能够做某事，通常指通过后天努力而实现的某种本领
manage to: 想方设法做成某事
但两者都可以表示成功地完成了某个动作
如：He was able to leave Europe before the war began.
He managed to leave Europe before the war began.
Special difficulties
say的相关短语
1. say ones prayers: 祷告 He knelt down and said his prayers.
2. say so: 说一声 If you want some more cake,please say so.
3. say a good word: 说好话 Im sure it would help if you could say a good word for him.
tell的相关短语
tell a story: 讲故事 Please tell us a story.tell the time：报时 Can you tell the time in English?tell the truth: 说实话 I want you to tell me the truth.tell lies:说谎 He often tells lies.tell the difference: 区分 Cant you tell the difference between an Austin and a Morris?附 本课单词听写表
