So small that they don’t admit much light at all.
A. the windows are
B. the window is
C. are the windows
D. is the window
网友回答
A. the windows are
(答案→)B. the window is
C. are the windows
D. is the window
解析：句意：这些窗户是这么小，以至于它们不能让太多的光线进来。So+adj.放在句首的时候，句子用部分倒装，be动词，助动词或情态动词放在主语前面，因为后面用了they，所以用windows，选B。