By the time he was 12, Edison______(begin)to make a living by himselfhad begun此题

游客2023-10-03 33

问题 By the time he was 12, Edison______(begin)to make a living by himself

选项

答案 had begun

解析此题考查的是动词的时态。“by”后面接的是表示过去的时间状语，所以主句要用过去完成时态。

转载请注明原文地址:https://tihaiku.com/zcyy/3068374.html

相关试题推荐

随机试题

最新回复(0)

Myparentsarenotusedto______(live)inbigcities.living本题考查固定的短语搭配。考查的短语为：