单项选择题
A. error B. mistake C. flaw D. fault
I have just()to a letter from a friend of mine in Londo...
单项选择题I have just()to a letter from a friend of mine in London.()
A. replied B. answered C. offered D. returned
Don't smoke in the meeting-room, ()A. do youB. will you...
单项选择题Don't smoke in the meeting-room, ()
A. do you B. will you C. can you D. could you
