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3. 掌握以下重点句子：
(1) You can buy four for only one dollar.
(2) How much does it cost?
(3) I’m afraid I can’t afford it.
(4) May I have some of your cookies?
教学准备
录音机，幻灯片，图片。
教学过程
Step 1 Lead-in
Discuss the following questions:
What do you do with your pocket money?
Can you think of an invention that would make your life easier?
How can you make money with your invention?
Show some pictures of buying things. Let the students discuss the questions in groups. Then ask them to present their results in front of the class. The styles are different. They can be dialogues or reports.
Step 2 Listening
Listen to the tape and fill in the blanks with the words you hear.
1. You can use one dollar to buy ________ cookies.
2. Danny’s invention costs _________.
3. The girl thinks Danny’s invention is too ___________.
Finish the task in class orally.
Step 3 Reading
Read the lesson and answer the following questions:
1. How many cookies does the girl buy?
2. Does Brian sell anything else?
3. What is Danny’s invention?
Finish the task in class orally.
Step 4 Practice
Make sentences with the language points:
1. pay for
S1: How much did you pay for your new bike?