单项选择题
A．We can do without railways. B．Trains have much in common with motorcars and planes. C．Motorcars and planes are not as good as trains. D．Trains are as good as motorcars and planes.
A．At midnight. B．In the morning. C．When the car is turned off. D．When the neighbor’s son leaves for work.
A．All the passengers were killed. B．The plane crashed in the night. C．No more survivors have been found. D．It’s too late to search for survivors.