Questions 20 to 22 are based on the passage you have just heard.

单项选择题A．Forbidding students to take food out of the restaurant.B．Requesting customers to pay before taking the food.C．Asking customers to leave their bags on the counters.D．Allowing only two students to enter at a time.

单项选择题A．He often teaches children what to do during a fire.B．He teaches Spanish in a San Francisco community.C．He provides oxygen masks to children free of charge.D．He travels all over America to help put out fires.

单项选择题A．She has to go to see a doctor.B．She got hurt in an accident yesterday.C．She is black and blue all over.D．She stayed away from work for a few days.

单项选择题A．What her job prospects are.B．Her new responsibilities in the company.,C．The director s opinion of her work.D．What the customers feedback is.

单项选择题A．She could work close to her family.B．She could use her previous experiences.C．She could improve her foreign languages.D．She could travel overseas frequently.