7. Why should Kate put some underwater plans in the tank?

　　Language points: (Show them on the screen using computer)

　　a. the other day = a few days ago

　　b They don't get enough air:

　　With a bowl, only a small surface area of the water is in contact with the air. So the water does not receive enough oxygen.

　　c 30 cm by 30 cm by 50 cm.

　　We describe two-dimensional and three-dimensional measurements using the word by. So the length of the tank is 50 cm, and the width and height both 30 cm.

　　e underwater plants:

　　These plants oxygenate the water and keep it clean.

　　d For one thing = one reason (for putting plants in the tank)

　　Step 4 . Dialogue Drill

　　1.In this step the students are required to practise the dialogue in pairs by reading the dialogue aloud. This step is employed to make the students grasp the useful phrases and sentences pattern for making suggestions and replying on the base of reading the dialogue fluently.

　　2.Let the students find out the expressions and sentence patterns for making suggestions and replying in this dialogue , in the meanwhile show these expressions and sentence patterns on the screen by computer one by one. This step is employed to give the students a deep understanding of those expressions.

　　Step 5 . Practice (part 2)

　　In fact, this step is intend to deal with the second part of the lesson(part 2). First show the words and phrases given on the screen, using a multi-media computer, then ask the students to make short dialogues with their partners to practise making suggestions and replying, using the phrases given in the table of Part2 .Give the students 5 minutes to prepare it. Ask the students to pay particular attention to sentence stress and intonation. At last ask some pairs to act their dialogue out in front of the whole class. This step is employed to make the students get a further understanding of these expressions.

　　Step 6. Consolidation( Dialogue Production)

　　This step gives the students 5-8minutes to make a similar dialogue using the phrases and sentences patterns learned in this dialogue and everyday life experience according to the given situation (show it on the screen using a multi-media computer). After 5-8minutes,ask several pairs to act their dialogue out in front of the other students. At last the teacher give some advice on making such dialogues, in the meanwhile deal with the moral lessons which the students should learn from the dialogue (mainly told the students to love life and animals, protect the nature and environment) . This step is employed to create a language environment for students’ communication in the class; and to give the students a chance to practise their spoken English under a quasi-communicative situation. If the students can finish this task well, they will benefit a lot in their spoken English.

　　Situation:(show it on the screen using computer)

　　One of your classmates wants to keep birds, he/she wants to buy some birds and builds a bird cage as big as 4m by 2m by 2m. he/she would like to ask for your advice. Now you’d like to advise him/her what to do?

　　Step 7. Workbook

　　Finish Exx 1 and 3 orally, left Ex 2 as written work.

　　Ex. 1 revises the Object Clause. When transforming the structures, the students are required to pay attention to the change of t he verb tenses, personal pronouns and word order. After doing the exercises orally in class.

　　Ex. 2 is a revision of the Modal Verbs and some useful expressions. Let the Ss work in pairs and then check the answers with the whole class. Write down the sentences on the Bb for the Ss to see.

　　Ex. 3 lists pairs of words with somewhat similar pronunciation but different meaning. Get the Ss to read aloud the words and say what each of them means.

　　Step 8 Homework

　　!.Do Ex 2 in the exercise books. This is used to make the students have a further understand of the modal verbs.

　　2.Write a short passage about the dialogue learned. This is used to practise writing ability of the students.