七、(★★★★☆)动动脑。
There's a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What color are the stairs? 有一栋一层楼的房子,里面所有的东西都是黄色的。黄色的墙,黄色的门,黄色的家具。楼梯是什么颜色的？

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There aren't any stairs—it's one-story house.