my surprise I got the first in the math competition.A. To B. In c. With D. Off

问题补充：

my surprise, I got the first in the math competition.

A. To B. In c. With D. Off

答案：

解析：句意：令我惊讶的是，我在数学比赛中得了冠军。to one’s surprise令某人惊讶的是，所以要用介词to ，故选A。