The radiation amount of a mobile phone for two half-hour periods per day is equal to ________ to an X-ray for ten seconds.
Mr. Green told us _______ talk loudly in class.
Does John know any other foreign language _______ French?
--- Do you want _____ tea or _____ coffee? --- ______, please.
--- Do you mind if I keep pets in this building? --- _______. A.I’d rather you didn’t, actually B.Of course not, it’s not allowed here B.Great! I love pets D. No, you can’t
The new research center will be set up was a wasteland 20 years ago.