You'd sound a lot more polite if you make are quest ________ a question.
考查短语词义。选项A. in search of(寻找);选项B. in the form of(以……形式);选项C. in need of(需要);选项D. in direction of(朝……方向,往)。所以,根据句意,选B。
【参考译文】如果你以提问的方式提出请求,会显得更有礼貌。