题目

. The glass doors have taken the place of the wooden ones at the entrance, __________ in the natural light during the day. A. to let  B. letting C. let      D. having let 答案：B 解析: B。此处用现在分词表示结果。又如：It rained heavily, causing severe flooding in that place. 大雨滂沱，造成了那个地方洪水泛滥。

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