It would be a good idea to use an empty room,_______ painted purple,as our temporary lab.

题目

It would be a good idea to use an empty room,_______ painted purple,as our temporary lab.
C the walls are D with its walls
C为什么不行

答案

选D "用一个墙壁是紫色的空房间来作为我们的现行实验室是个不错的主义."
with its walls.是一个伴随状语.如果用C,则出现了第二个谓语“are”,不符合语法.