试题详情
单项选择 适中0.65 引用2 组卷223
If the electric light ________ invented, people ________ in darkness during night at that time.
A.were not; could have livedB.were not; could live
C.had not been; could have livedD.had not been; could live
23-24高一上·全国·课后作业
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