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

His sister has recently got engaged ____ a foreign teacher, who has engaged ____ education research for years.

1. A.
   with; in
2. B.
   to; in
3. C.
   with; on
4. D.
   in; for