问题
选择题
Mary has recently got engaged ________ a foreign teacher, who has been engaged ________ education research for years.
A．with; in
B．to; in
C．in; to
D．in; for
答案
答案：B
考查介词。短语：be /get engaged to 与某人订婚，be engaged in doing sth 致力于做某事，句意：玛丽最近已经和一名致力于教育研究好多年的外教订婚了。所以选B。