Unit 6 Topic 1 Section B 一、 Teaching contents: Sentence patterns: 1. Is there a/an …? Yes, there is. No, there isn’t. 2. Are there any …? Yes, there are. No, there aren’t. 3. What’s on the desk?There is a lamp, a computer and some books on it. 、Teaching difficulties: 1. Is there a book? Answers. 2. Are there any books? Answers. 3. Principle of proximity.