单项选择题
A．Working in an emergency room. B．Watching horror movies. C．Listening to rock music. D．Doing daily routines.
A．Expensive drugs may not prove the most effective. B．The workings of the mind may help patients recover. C．Doctors often exaggerate the effect of their remedies. D．Most illnesses can be cured without medication.
A．Major European airlines will go bankrupt. B．Europeans will pay much less for traveling. C．Traveling time by train between major European cities will be cut by half. D．Trains will become the safest and most efficient means of travel in Europe.