单项选择题
A．staffs B．lessons C．buildings D．graduates
A．They take the food home with a doggie bag for their dogs. B．They leave the food on the table and go away. C．They take the food home with a doggie bag and enjoy the food later. D．They ask the waitress or waiter to keep the food for them.
A．no traffic is allowed on some streets B．traffic is computer-controlled C．cars move very slowly D．only one way streets are open to traffic