賴世雄教你輕松說英語Unit 251 Why are you shivering?你為什么抖個不停?

Unit 251
（I see Peter, and you just put on your jacket.
I put on my jacket. … you are holding ruler.
…I’ll want underline.）
Why are you shivering?
It’s freezing.
…engineer muffle.
It’s freezing cold.
It’s biting cold.
It’s scorching hot.