All the letters ___,John took them to the post office.
A.had been writing B.having been written C.wrote D.had written选什么为啥
All the letters ___,John took them to the post office.
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解决时间 2021-02-21 07:32
- 提问者网友：放下
- 2021-02-20 15:07
最佳答案
- 五星知识达人网友：十年萤火照君眠
- 2021-02-20 16:21
B
All the letters 【having been written 】（独立主格结构）,John took them to the post office.
All the letters having been written 是独立主格结构做时间状语的
等于When all the letters had been written,
题干因为没有连词,只能用独立主格结构了,前一部分不能选用A,C,D等谓语动词
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