In the days when coal was so (widely) used, (no one) realized how soon and how (

游客2025-03-17 15

问题 In the days when coal was so (widely) used, (no one) realized how soon and how (complete) oil would replace (it).

选项 A、widely
B、no one
C、complete
D、it

答案 C

解析应改为completely。how修饰副词，并且soon和 completely并列。

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