了解今日课堂：

Dialogue :

Stting is bad for you

dialogue 1

Jingjing: Mark, are you ______?

Mark: ______: As the weather gets cold, I've been able so far to______. What about you?

Jingjing: I______, and woke up a few mornings ______, but got better before ______anything serious.

Mark: I've not known you to______. What's ______?

Jingjing: Well, I get______ twice a week—or more often if ______ for it.

Mark: Is that______?

Jingjing: It is. I wouldn't______ if it wasn't.

Mark: Anything else?

Jingjing: Yes, and I think it's ______. I ______ for long periods of time.

Mark: You have to ______, though, don't you? How do you ______?

Jingjing: I ______ leave my desk for long. I just make sure to______, ______, and walk around.

Mark: That's a great habit. Too often, I ______ and then look at my computer clock to notice I've not ______.

Jingjing: That's ______.

Mark: I know, I know. But ______?

Jingjing: Even if you have to do______ at a desk each day, you could ______ intervals of physical activity. ______ if you need to. That might even help you get tasks done more quickly—before each break.

Mark: That's ______, Jingjing.

Jingjing: I'm ______.

Mark: Say, what's______ sitting anyway? It seems______; but I keep hearing people say ______.

Jingjing: I'd be glad to______ with you.

Mark: OK, I'm ______.

dialogue 2

Jingjing: Mark, are you ready to hear about ______?

Mark: I ______. I was thinking about it the whole time I went to ______.

Jingjing: So,______ is that our bodies just ______.

Mark: It seems like ______. Besides, why does our world have so many chairs?

Jingjing: Well, it's OK to ______ for a few minutes and have a rest. But think about how many muscles we have, and ______.

Mark: Yeah, ______.

Jingjing: ______, when people sit, they tend to______.

Mark: Yeah, that's me, I ______. I'm not exactly Mr Posture.

Jingjing: Ha ha; well, in a chair, ______.

Mark: But what's ______ about that?

Jingjing: It puts ______a person's spinal discs.

Mark: I know lots of people who ______. It can be______.

Jingjing: Back pain is______. Getting up and stretching can do a lot to______.

Mark: Then I'll look for an app or something that ______, as a reminder for me to______.

Jingjing: That's a great habit. It also ______ for work. Just think about ______ when you're______ a computer keyboard.

Mark: ______, Jingjing. Hopefully you won't______ back problems in the coming months or years.

Jingjing: I'm glad to ______, Mark.

new words and phrases

fend off <something> (or) fend <something> off:

have a brush with <something>:

tunnel vision:

the long and short of it:

no joke:

Copy that.: