A. the doorbell rang B. the doorbell rings C. we heard the doorbell ring D. we heard the doorbell rings
单项选择题Just take it easy and （） us exactly what has happened.
A. say B. speak C. tell D. talk
单项选择题Professor Wilson keeps telling his students that the future （） to the well-educated.
A. is belonged B. is belonging C. belongs D. will be belonged
