An excellent teacher is believed to be one who devotes himself to the children but ask for nothing .
A. in turn
B. in advance
C. in short
D. in return
网友回答
A. in turn
B. in advance
C. in short
(答案→)D. in return
解析：D 句义：人们认为一位优秀的教师应该是把自己的一切都奉献给孩子而不求任何回报的人。Devote oneself to专心于…；in return作为回报；in turn依次，轮流；in advance提前，预先。In short总之，简言之。