2. 外语
  3. The workers requested that their working conditions ______.

The workers requested that their working conditions ______.

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问题 The workers requested that their working conditions ______.
选项 A、must be improved
B、be improved
C、would be improved
D、were improved
答案B
解析 be improved“工人们要求改善工作条件”。request后面的宾语从句中的动词要用虚拟语气形式，且根据语义，此处应为被动结构，因此，be improved是惟一的选择。
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