2. 职称英语
  3. Thirteen hundred medical professionals, all of which have been trained to treat

Thirteen hundred medical professionals, all of which have been trained to treat

游客2025-05-02  1
问题 Thirteen hundred medical professionals, all of which have been trained to treat drug dependency, attended the annual convention sponsored by a society
选项 A、Thirteen hundred
B、all of which
C、attended
D、sponsored
答案 B
解析 句子大意为：有1300个医学专家参加了一个协会发起的年度大会，他们全部经过医治药物依赖症的训练。本题考查关系代词的用法。在引导非限制性定语从句时，如果指代对象为人，则应使用whom。故all of which应改为all of whom。所以，正确答案是B。
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