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题目内容双击单词支持查询和收藏哦～
Dependence on foreign sources of heavy metals, though(i)_____, remains(ii)_____ for United States foreign policy.
- A.deepening.. a challenge
- B.diminishing.. a problem
- C.excessive.. a dilemma
- D.debilitating.. an embarrassment
- E.unavoidable.. a precedent
B显示答案
以上解析由 考满分老师提供。
