He was a famous professor of physics. He was born in Germany and spent the last part of his life in the USA. We will learn more about this great scientist in this unit ExaminationStep V ExaminationFill in the blank according the Lesson 49 on page 1
A： The American president who for the freedom of slaves in the USA.
B： No， it’s not him.
A： Is it？
B： Who is he？
A： He wrote books about. He said that all communists should help each other.
B： No， it’s not him.
A： Is it ？
B： What did he do？
A： He made the first telephone.
B： No， it’s not him.
A： Is it ？
B： What did he do？
A： He was a famous professor of. He lived in this century， wasborn in Germany and spent the last part of his life in the 。
B： That fits the ！ It must be him！
Key： fought， Karl Marx ，communism， Alexander Bell ，Albert Einstein， physics， puzzle.
Step VI Homework
1.Preparation Lesson 50.
2.Finish off the exercises.
Lesson 50
TextStep I Watch the video教师让学生看本课的视频
comprehension
Step I Lead in
See the pictures and then answer （教师显示此图片）
1） Do you know about Albert Einstein？ 2）Who can tell a short story about him？Step II Listening
教师在这里让学生听本课课文。（教师播放声音）
Listen to Lesson 50，after that answering the questions are true （√）or false（×
）
1.Albert Einstein was curious about everything around him when he was young. （√）
2.He had learned everything all by himself. （× ）
3.He took Swiss nationality in 1909 in order to study there.（×）
4.Einstein and his family left Europe for the USA in 1933 because he was afraidof being killed in the war.（×）
Step II Reading
教师列出爱因斯坦的生平，让学生说出答案，同时教师可展示不同时期爱因斯坦的照片。
Read the text ，then answer the time line of Einstein1.1879：
2.As a boy：
3.By 14：
4.From 1896：
5.1905：
6.Between 1905 and 1915：7.1918：
8.1921：
9.1933：
10.1940：
11.1955：
Key：1 Born in Germany， 2.Curious about the world， 3. Learned maths all by himself， 4.Studied in Switzerland； self-reliant， 5.Received a doctor’s degree， 6. Animportant period； began the research and studies leading to new discoveries， 7.Received worldwide praise for scientific research，8.Given the Nobel Prize for Physics，9.Left for America； worked as Professor of Physics，10.Was granted American nationality，11.Passed away at the age of 76
Explanation
教师让学生看本单元的重点词汇，教师可进行讲评。
Vocabulary Study
1） be content with
You should be content with what you have.
2） lead to
This idea in teaching might lead to a new method.
3） work out
Mary worked out a beautiful design for a sweater.
4） stick to
I stick to what I said yesterday.
5） take sides （in /with）
Everybody in the office takes sides in the argument.
Activities
教师组织学生进行两部分的口语练习，给学生5-10分钟的时间。最后教师进行总结。
Interviews
Pair work： Interview Einstein personally with the following hints：His most important piece of research； his attitude toward wars； why leaving Germany for the USA； whether enjoying life here； future plans etc.
Group work： Suppose you were Einstein’s friend， student， neighbor， colleague，former teacher， or grandchild； now you are invited to make a live broadcast on TV talking about Einstein， his boyhood， his determination， his devotion to the scientific research， his generosity， his hobby and interest， his attitude toward money， his success and his efforts to the human rights.
Homework
1.Retell the Lesson 50
2.Preparation the Lesson 51.
[1]Satellites
Satellites
【教学建议】
对话建议
借助对话课的学习与操练，表示打算和意愿的常用语句，组织学生模仿对话，并且讨论相关的话题。比如：可以让学生们自己设计对话，到前面来表演。
语法建议
归纳和复习定语从句，从一个句子开始，让学生们分析此句，和学生一起讨论介词＋定语从句的用法。如：
There is a rocket motor by which the direction of the satellite can be changed.
提问学生：
1） 如何翻译此句？
2）此句为限定还是非限定定语从句？
3）在做介词＋定语从句的用法，应注意哪此问题等等。
课文建议
组织学生理解课文，结合课文，用英语简述人造地球卫星在传送广播，电视信号，预报天气情况，世界通讯行业和观测太空等方面的巨大作用。给学生展示图片，同时提供学生观看视频。
重点讲解
分析in space 在太空中
（1）A few astronauts have walked in space so far. 到目前到止，有几位宇航员已在太空中漫游过。
（2）Maybe some of you will be traveling in space in the future. 将来你们中有些人可能会在太空中旅行。
space表示“天空、太空”时有不可数名词，构成介词短语不加冠词。例如：from space从空中，into space进入太空，through space穿过太空。
分析so far as
so/as far as…“就……尽……，就……而论”表示一定程度或范围，该短语常引出一个分句，在句中作插入语，通常用逗号分开。
You’d better learn English so far as you can.你得尽你所能来学习英语。
As far as I know， she has never used the computer.据我所知，她从没用过计算机。
So far as I know， she has not much money.就我所知，她没有很多钱。
分析dozen
n.一打、十二（个），用法与score相似，但需要注意三点：①当dozen与数词或many， several 等连用时，不加s；②dozen后加s时，常与of连用，修饰复数名词；③dozens of 译作“好几十、许多”，前面通常不用基数词。
two （many、several） dozen pencils 两（好多、几）打铅笔。
We had to have dozens of chairs for the party. 我们必须为聚会准备几十把椅子。
I’ve been there dozens of times.我曾去过那儿很多次。
辨析likely， possible， probable相同点
这三个词都有“可能”的含意。
不同点
likely 是表语形容词，作“很可能”解，常接不定式短语；构成be likely to do sth.， 主语可以是人，也可以是物，但不可用句型It is likely forsb. to do sth.， 而应用It is likely that…
possible是表语形容词，强调客观存在的可能性，但含有可能很小的意味，常用的句型为：It is possible to do sth，It is possible for sb. to do sth.以及It is possible that……如果用表示人的词作主语时，possible后面的不定式动作的逻辑宾语应是句子的主语。
probable是形容词常作表语，强调有根据、合理性，表示有很大可能性，它的主语不能用表示人的词，也不能跟不定式；常用It is probable that…句型。
例子如下：
It is likely to be fine tomorrow.
It is possible that a storm will come tonight.
Tom is possible to live with.（Tom是live with的逻辑宾语）
It is probable that he forgot.
注意：
在表示可能性时，likely 和probable语气相当肯定，都作“有可能的”解，两者均比possible的语气强，而且可能性程度也比possible大，likely都用口语中。
It’s possible but not probable or likely that she’ll come here next week.
1．To escape the pull of the earth， a rocket must reach a speed of 40， 000 k。p.h. 为摆脱地球的引力，火箭的速度须达到每小时四万公里。
①pull作“拉、拖、拔”解。本处相当于gravity。如：The boy gave a pull at the rope and then ran away. 这些孩子们将绳子拉了一下就跑开了。
②speed的搭配：at a speed of 120 m. p. h. 以每小时一百二十英里的速度……
at the speed of light / sound 以光/音速at top speed以最大速度。
at （a） high speed以高速with great speed / all speed / good speed快速地，迅速地，高速地。
2．It is therefore possible to say not only what the weather is like at present， but also what is likely to happen in the next day or two. 因此， 它不仅可以报告当前的天气情况，还可以预报未来一两天内天气可能会发生的情况。
1） 本句是一个由“it”作形式主语的句子，真正的主语是动词不定式“to say…”
。
