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_____ people found out the behavior of electricity.

A、Through experiment that

B、Through experiment it was

C、It was through that experiment

D、It was through experiment that

时间：2022-01-11 03:10 关键词： 大学英语考试 成人学士学位英语

答案解析

D
此题为强调句型“It was not until ... that”，用来表示时间的名词和时间的状语从句。