2）语言知识分析：
Travelling on these lines was inconvenient, though意为“然而，搭乘这些线路很不方便”，句子中的though为副词，意为“可是，不过，然而”，常被置于句中或句末。
3)考点考例：[考点] as引导原因状语从句
[考例] Jenny was very sad over the loss of the photos she had shot at Canada, _____ this was a memory she especially treasured.（广东2006）
他通过每天练习提高了他拉小提琴的技能。
He has improved his violin-playing skills by practising every day.
4. A newly built line was used as an underground aeroplane factory, a closed station was used as an anti-aircraft centre, and the station nearest the Prime Minister’s house was used by the Prime Minister as meeting rooms for the government administration.Lines 42-45)
choke back抑压住(感情)，忍住(哭泣)。choke down硬用力咽下；硬忍着(气)，抑制住(感情、眼泪等)。choke off把…闷死，绞死；使中止，使放弃(计划)。choke up使闷死；枯死；〔口语〕激动得说不出话来，紧张得发呆。choke up with阻塞，填塞，塞满。)
6 It was decided that…_______________________________
1）句子结构分析：此句为and连接起来的三个并列句。
第一个分句为A newly built line was used as an underground aeroplane factory；第二个分句为a closed station was used as an anti-aircraft centre；第三个分句为the station nearest the Prime Minister’s house was used by the Prime Minister as meeting rooms for the government administration。
9 image doing _______________ 10. link up___________________
(link up: to connecte.g.1) The two islands will be linked up by a bridge.
2) If you link up the pieces of information, you will be clearer about what has really happened.)
comparative adj.比较(上)的;相当的，还可以的;〔委婉语〕(广告等)比较性的，攻击竞争者的。in comparative comfort相当舒适地。with comparative ease比较容易地
compare vt.比较，对照(with);参照;把…比作为(to)
vi.相比，匹敌(with)
A. asB. ifC. whenD. where
选A。句意为：珍妮因为丢了在加拿大拍的照片感到很伤心，因为这是她特别珍惜的一段记忆，用as。其他三项都不表示原因。
3. Having seen the situation, a wealthy American businessman, Charles Yerkes, tried to improve the system by buying many of the different lines and setting up the Underground Group. (Lines 30-32)
It would be beneath him to cheat.他去行骗未免有失身份。
adv.在下，在下面，在下方，在下位。
The valley lay beneath.山谷就在下面。)
parativelynarrowtunnels___________________________
(comparativelyadv. comparatively speaking比较地说来〔插入语〕)
2）语言知识分析：Having seen the situation意为“看到这种情况”。一般说来，V-ing形式作状语时，逻辑主语为主句的主语，用完成式表示其动作发生在主句谓语动词的动作之前。
3)by: by means of
Aliceleft her keys at home. She had managed to get into her room by climbing through the window.
without distinction (= difference)没有区别
make a distinction between A and B = make a difference between A and B区别A和B = distinguish A from B (between A and B)}
1）句子结构分析：此句虽然很长，但实际上是一个简单句。主干为a wealthy American businessman tried to improve the system。
句首的Having seen the situation为V-ing短语作状语；Charles Yerkes为a wealthy American businessman的同位语；后面的by buying many of ...是方式状语。
教学重点
A study of new words, expressions and analysis to difficult sentences.
教学难点
Usage of language points.
教学过程
复备栏
Step1Abrief revision of the text
Try to help students to recall the information of the London Undergroundin the worldin the following aspects: introduction,reasons,development,unusual functions,popularity
11. in the middle of the city __________________________________
12.加快……步伐_________________________________________
13.be responsible for _________________
Step2. Difficult sentences.
1. However, most trains intoLondononly went to the distant boundary of the city because building railway tracks into the city would have caused damage to many historic buildings. (Lines 4-5)
Step3.Translation
1.have the distinction of _________________________________
{distinction n.区别,差别,声望
have the distinction(=reputation) of doing sth.享有做某事的荣誉（盛名gain / win / obtain / attain distinction（=fame）出名= become famous
1）句子结构分析：在这个复合句中，most trains into London only went to the distant boundary of the city是主句；
because building railway tracks into the city would have caused damage to many historic buildings是原因状语从句。into London和into the city都为介词短语作定语，分别修饰trains和railway tracks。
2）语言知识分析：
would have caused damage to many historic building意为“将会给许多历史建筑造成损害”。句子中would have caused为虚拟语气，表示过去并未发生
的事情。
2. Travelling on these lines was inconvenient, though, as each line was separately owned and many were very far from each other. (Lines28-29)
5.堵塞交通__________________________________________
(chokevt.使闭气，使闷死；使闷塞；扼(喉)，绞死;堵塞，填塞; .阻止，防止，扼止；干死(植物)；减(火)；压住，抑制(情感)
vi窒息噎，哽; (管道等)塞住说不出话来窘住；举止失措，行动失当;
结构分析：Travelling on these lines was inconvenient, though为主句，as each line was separately owned and many were very far from each other为原因状语从句；