Question

We will have to operate _________ his eyes.

A.for B.on C.in

Answer

B

【解析】

句意：我们得给他的眼睛动手术。

考查介词。for为了；on向，朝；in在……里面；operate on表示“给……动手术”，结合“operate _________ his eyes.”可知是给他的眼睛动手术，用“on”，故选B。