Mary and Tom often go to school with each otherA. alone B. instead C. together
–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.
–Have you finished your homework?– _________ . Just half of it. How about you?