In the past, the workers were made __________ 12 hours a day.
—Could you tell me what time the train leaves Tai he for Beijing. —I’m afraid you need to ___________ on the Internet.
—Is Mr Hu driving here? —I’m not sure. He ___________ come by train.
—Who is singing in the next room? —___________ must be Marie.
—TV says there will be a storm tomorrow. —___________, I planned to go climbing with my classmates.
Smile to the world, ___________ the world will smile back to you.