Our teacher is very kind to us. So we regard her our best friend. A. onB. toC. asD. at

问题补充：

Our teacher is very kind to us. So we regard her our best friend.

A. on

B. to

C. as

D. at

答案：

A. on

B. to

(答案→)C. as

D. at

解析：考查短语：regard … as把什么当做，句意：我们的老师对我们非常和蔼。因此我们把她当做我们最好的朋友。故选C。