2. 外语
  3. Rescue workers continued the delicate task of sifting through tons of concrete and to try to reach possible survivors.

Rescue workers continued the delicate task of sifting through tons of concrete and to try to reach possible survivors.

admin2011-02-26  112
问题 Rescue workers continued the delicate task of sifting through tons of concrete and to try to reach possible survivors.
选项 A、scraps
B、leftovers
C、debris
D、residues
答案C
解析
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