2. 职称英语
  3. Most people are not yet aware that water is precious resource that must be______

Most people are not yet aware that water is precious resource that must be______

游客2024-08-17  53
问题 Most people are not yet aware that water is precious resource that must be______.
选项 A、enriched
B、preserved
C、reserved
D、conserved
答案 D
解析
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