B: “Listening and speaking” (by the tape and the pictures)
On the tape, work in groups. First listen to the tape,the practise describing people and debating on a branch of science or a scientist. Use more the infinitive and the Useful expressions for application. Encourage students to read and listen the materials as more as possible, enrich their language and make them be familiar with some wonderful sentences and increase their vocabulary. By doing this, students can put them down on their exercises while speaking. Then facing the real situation，I conducted exercises with live ammunication to my students.New language ponits are introduced and practised situationally，e.g. words should be presented in sentences，and sentences should be practised in meaningful contexts and not be taught as isolated，disconnected elements.Learn the grammar by the following sentences：
e.g.(1)Hawking has continued to seek answers to questions about the nature of the universe.
(2)To explain what they have seen，they build a theory about the way in which things happen and the cause and effects.
(3)The doctor told him that he might not have more than twelve months to live.
(4)In order to get married，I needed a job，and in order to get a job，I needed a phD.
(5)People who listen to Hawkings lectures sometimes find it difficult to understand him.
(6) What words and expressions will you need to talk about Galileo Galilei？
(7)Scieitists look at the world and try to describe and explain what they see.
C:"Practising and free talking."
