So difficult ________ it to work out the problem that I decided to ask my teacher for advice.
Li Ping runs _______ than Ji Fang.
——How heavily it is raining! —— What a pity!We have to_____our sports meeting.
——Why are you walking so quickly,Edward? ——There_____a talent show in ten minutes.
He _______ for ten years.
——Do you know_____? ——He is a dentist.