We all know the truth ___ there are air, water and sunlight there are living things.
You must apologize_______your mother_______your rudeness.
—Is John coming by train? —He should, but he_______not. He likes driving his car.
Nobody recognized her at the ball because she________________as a maid..
She spent all her spare time learning the courses, or she________ the first place in her school in the 2010 College Entrance Examination.
—— Were all the passengers in the bus injured in the traffic accident? —— No,____ only three of them who got hurt.