单项选择题
A、 He’s a professor. B、 He’s a surgeon. C、 He’s a physician. D、 He’s a dentist.
A、 Sleep is the solution for all types of fatigue. B、 Psychologically healthy people do not suffer from fatigue. C、 Changing your diet cannot cure psychological fatigue. D、 You won’t become fatigued if you are doing something you enjoy.