农场主用马匹来拉犁。

The farmer uses ___horses to pull the plow.

教练教孩子们如何在马背上保持平衡。

The coach taught the kids how to balance on the ___horse.

他因在街上贩卖毒品被警方逮捕了。

He was arrested by the police for selling ___horse on the street.