英语语法填空练习:墙壁如何阻挡水流?

题目:

The walls function like a dam to keep the water _____ and the structure lies naturally within its surroundings, remaining invisible from a distance.

选项:

A. of B. out C. in

答案:

B. out

解析:

本题考察介词的用法。根据句意,墙壁的功能像水坝一样,阻止水流进入。'keep out' 是固定搭配,意为 '阻止进入',符合语境。


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