单项选择题
M: Tom, would you mind driving me home M: Sure, why not.
A. He refused to drive her. B. He has a new car. C. He forgot his driver’s license. D. He is glad to drive her.
A. sleep is important for good mental and physical health B. a light sleep is as restful as a deep sleep C. memory is improved during sleep D. sleep is relatively unimportant for human beings