Many different parts are closely connected.

My God, the case is so complex!

Part two The reasons for the building of the underground

1. Help students to paraphrase the sentence (ppt.10)

　　　Most trains into London only went to the outer city limits, because building railway tracks into the city would have damaged many old buildings..

　　　If the railway tracks ____ ____ built into the city, they would have caused damage to many historic building. So trains only went to the places that are _____ away from the city.

　　　Answers: had been, far

2. Help students to find another word to replace "convey"? (ppt.12)

Horse-drawn buses, trams, cabs and carriages were used to convey people to and around the city centre.

☆ All this information can be conveyed in a simple diagram.

☆ Your luggage will be conveyed to the hotel by taxi.

　　　Answers: expressed, carried

3. help students to fill in the blank.

Unfortunately, the number of vehicles on the road caused unbelievable traffic ________, and the road became so busy that no one could travel anywhere. This traffic problem led to the development of the underground system.

Answer: jam

Part three The development of the underground system (ppt.14-23)

Help students find detailed information about the development of the underground system. At the same time, explain some new words.

Part four The unusual uses of the underground

Help students understand different meanings by analyzing the following two sentences (ppt.24)

☆ During World War II, when London was bombed, many underground stations functioned as bomb shelter.(L41)

☆What other functions does the underground system have?

Part five The popularity of the underground

1. Help the students list the reasons for the popularity of the underground (ppt.26)

☆ The London underground system is working to transport millions of people as it has done for many years.

☆ Three million people travel on the underground every day.

☆ The network of the underground system includes twelve lines and now goes twenty-six miles out of central London.

2. Help the students fill in the blank and explain the meaning of "permit" (ppt.26)

So, why not take a trip on the oldest underground system today? Visit our ticket office and buy one of the travel cards that __________ you to travel all over the underground system.

Answer: permit

3. Help the students summarize the usage of "permit" by analyzing the following two sentences and