单项选择题
A．She isn’t sure when Prof. Bloom will be back. B．The man shouldn’t be late for his class. C．The man can come back sometime later. D．She can pass on the message for the man.
A．It actually does more harm than good. B．It causes damage to some organs of our body. C．It works better when combined with other remedies. D．It helps us to recover much sooner.