—How long have you _____the novel?—Three days.
When we practice speaking English, we often end up _______ in Chinese.
There is ______ “u” and ______ “s” in the word “bus”.
-- Do you think the chicken taste_______? --She cooked it ______, I think.
My uncle ___________ a farmer. Now he is a driver.A is used to B is used to be C used to being D used to be
Tom with his parents______ to America. They_____ back in two weeks.