— I think students should have mobile phones to call their parents at school..—_______. They often use them to play games instead.

 ---- I don’t feel well today. I have a stomachache.----Sorry to hear that. ______________________.

—Can you work put the physics problem?—Sorry, I can _________ understand its mean­ing. 

--Haven’t seen you for ages! Do you still work in Guangzhou?---______. It’s two years since I worked there.

—Waiter, ________?—Wait a minute, sir. That’s $ 80 altogether.