Although ____ my opinion, the old professor didn’t come up with his own.
A. against B. on C. for D. in
Although ____ my opinion, the old professor didn’t come up with his own.
A. against B. on C. for D. in
A
against意为“相反，反对”，against my opinion意为“反对我的想法”。句意“虽然反对我的想法，那位老教授没有提出自己的想法”。on意为“〔基础、理由、原因〕依据，靠，因……，从……得来的，(费用等)由……承担(支付)”；for意为“为了”；in my opinion意为“据我看来”。