单项选择题
A. all nature, including man, is growing then B. it lasts longer than the other seasons C. it is not too warm and not too cold D. both B and C
A. People want to see the person they are talking to on the phone. B. email is easier than talking on the phone. C. People are using writing and reading more with email. D．email is not private enough．
A. hospital and warm B. out going C. friendly and helpful D. all of the above