Don’t stand up until you ____________.
| A．tell to | B．are told | C．are told to | D．are told to do |
—Doctor, ____________should I take this medicine?
—Twice a day.
A. what time B. how much C. how often
Chinese people complain that the price of the apartment is getting_____________.
A. lower and lower B. higher and higher C. cheaper and cheaper
You won’t feel happy at school___________ you get on well with your classmates.
A. though B. unless C. because
—How do you communicate with your foreign friends?
—________________writing e-mails, of course.
A. With B. By C. From
Nowadays, ___________of business letters are written in English.
A. two third B. two thirds C. two three