----- How are you ?----- Fine, thanks. ___________---I’m OK.A. How do you do ?B. Are you ?C. And you ?
–What does she usually use the computer _________? – She usually uses it to chat with her friends.
The factory _________ since two years ago.
–Where is your father? – He _________ Australia and he_________ Sydney for two weeks.
– How long has Robot _________ ? – Since2004.
Great changes _________ in Nanjing since the1990s.