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: 题干为“玻璃门代替了木门，结果白天进来了自然光。”故选letting. 现在分词作结果状语表示自然而然的结果。如果选to let，应去掉前面的逗号。

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