今天Christina老师给我们预习的单词并不难。
1、 toothache n.牙痛
2、 afraid adj.害怕的
3、 painful adj.疼痛的；引起痛苦的
4、 tongue n.舌头

Conversation A
Tom: So my appointment is at 9:30 on Friday? OK, thanks. Bye.
Jack: What appointment do you have on Friday?
Tom: I’m going to the dentist.
Jack: Do you have a toothache?
Tom: No, I’m just going for a chechup.
Jack: Good for you.
Emma: Hey, Tom. Are you going to the dentist?
Tom: I made an appointment for Friday.(注意这些的on用法)
Emma: Great.
Stent的讲解表现很搞笑。checkup就是you make sure everything is OK.

Conversation B
Tom: Pam is so excited about going to her dentist. I decided to try him.
Emma: Jack, when was your last appointment?
Jack: Three years ago?
Emma: Then you should make an appointment with the dentist too.
Jack: I’m a little afraid of going to the dentist. It’s usually a painful experience.
Emma: Dentist are not trying to hurt you. They’re trying to help you.
Tom: Dentist help us have healthy teeth.

Conversation C
Jack: My teeth are healthy.
Tom: Are you sure?
Jack: Yes. See? My teeth are fine.
Tom: But how are your gums? And do you brush your tongue?
Emma: Here, Jack, drink this.
Jack: Wow, that’s cold. Ow, my teeth hurt.
Emma: A-ha! You were wrong. Your teeth are not healthy.
Jack: OK, I’ll call the dentist and make an appointment.
在本段中，我们就能找到今天问题的答案了,Jack will call the dentist and make an appointment.
本段还讲到了一个新单字，gum,名词，牙龈。常用复数形式gums

接下来，Christina老师给我们讲了一个新句式，when was your last XXX?，你上次XXX是什么时间，其实就是问“你有多长时间没去XXX了？”。这个句式要记清并能活学活用，因为这是一个地道的用法。
be afraid of doing something 害怕做某事

Sing and Say的Black Pearl老师发音浑厚，但教唱的那些东西并不吸引我。Blow out the candles on the cake.
Calendar Phrase中，教的句子是I’m going to the dentist.我要去看牙医

在Christina的Information Desk，她给我们预习了今天的单字。
1、 dentist n.牙医 How offen do you visit yourb dentist?
2、 tooth,teeth n.牙齿
3、 brush v.刷（用牙刷刷）
4、 toothbrush n.牙刷
5、 gentle adj.温和的，温柔的
站长也添加一些相关词：
6、 toothpaste n.牙膏
7、 toothpick n.牙签
8、 toothache n.牙痛

Conversation A
Tom: Pam, why aren’t you eating your lunch?
Pam: I’m going to the dentist in 10 minutes.
Tom: Can’t you finish your lunch in 10 minutes?
Pam: No, I can’t.
Tom: You can eat something. Do you want my salad?
Pam: No, thanks. I can eat later. My teeth are very clean now.
本段对话直接给出了本文Find It的答案Pam is going to the dentist.也就是说She has a dentist appointment.
A dentist is a doctor for your teeth.
When you look inside your mouth, you can find many teeth.

Conversation B
Tom: Your teeth are very clean and white. Do you brush your teeth a lot?
Pam: Yes, I brush them often. I also get a new toothbrush every 3 months.
Tom: You must like new toothbrushes.
Pam: I do. And I go to the dentist every 6 months.
Tom: Wow, you take good care of your teeth.
Pam: My dentist says that too.
牙刷就是something you hold in your hand, and you move up and down on your teeth to clean them。

Conversation C
Emma: Who is your dentist?
Pam: I go to Dr.Smith.
Emma: Oh, my dentist is Dr.Chen in the mall. She is a great dentist.
Pam: Dr.Smith is the best. He is very gentle.
Tom: What time is your appointment?
Pam: My appointment is at 12:30. Oh, I’m late, bye!

lunch在通常情况下，是不可数的，一般指午餐的整件事。Lunch is very important. go out for lunch.
但如果特指某一顿饭，可以当可数名词来用，前面可以冠词。That was an expensive lunch.

every three months, every three weeks, every other year

Calendar Phrase中，讲的是My tooth hurts.我牙痛