单项选择题A. Those who stay in a small area for long. B. People who work with computer all the time. C. People who are tired and weak. D. Those who sleep enough but feel tired all the time.
单项选择题A. Mary didn’t call. B. Mary will call next time she comes to town. C. Mary called to say that she would come to town some time later. D. Mary hopes to come and see them some other time.