—My old friend White is going to visit me.—We haven't seen each other_____ five years.A. since B after C. for
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.
My mother _________ a history teacher.