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题目内容双击单词支持查询和收藏哦～
Although trains may use energy more (i)_____ than do automobiles, the latter move only when they contain at least one occupant, whereas railway carriages spend a considerable amount of time running up and down the tracks (ii)_____, or nearly so.
- Blank(i)
- lavishly
- efficiently
- routinely
- Blank(ii)
- vacant
- unimpeded
- overlooked
efficiently , vacant 显示答案
以上解析由 考满分老师提供。
