问题
选择题
His sister has recently got engaged ____ a foreign teacher, who has engaged ____ education research for years.
A．with; in
B．to; in
C．with; on
D．in; for
答案
答案：B
本题考查介词的用法。be engaged to sb“与某人订婚”；be engaged in sth“忙于做某事”。