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题目内容双击单词支持查询和收藏哦～
Geologists suggest that as the most productive oil reservoirs begin to dry up, the expensive cost and high risk of drilling in the marginal area become less _____ and more acceptable.
- A.onerous
- B.efficacious
- C.auspicious
- D.benign
- E.natural
A显示答案
以上解析由 考满分老师提供。
