—Don't worry about that. It'll be easier after the high-speed railway _________.
The clocks are an hour.
—Yes, she's often seen ________ the old man with his housework.
— He is a serious boy. Whenever he ______ the tasks, he will try his best to finish them well.
The building the workers every day.
—Sorry, I didn't. But now I know smoking ________ here.
—No, it___________. That's one of the school rules.