补全对话。

A: What can I do for you. Sir?

B: 1_____

A: For yourself? These are a~for young people. 2_____

B: I like the blue one.

A: 3_____

B: Thank you 4_____

A: One hundred yuan.

B: Oh, it costs too much.

A: 5_____ It is cheaper. It is only fifty yuan,.

B: OK. I'll take it. Thank you.

I want to buy a hat for myself.

How much is it?

What color do you want?

What about this one?

What size do you want?

OK. Here you are.

It's beautiful. isn't it?

我国中小学的教学内容，具体体现在中小学各类（）和各科课程标准、教科书之中。