2. 考研
  3. The United States Department of Labor (enforces) laws that (promote) the welfare of wage earners, (improving) occupational condi

The United States Department of Labor (enforces) laws that (promote) the welfare of wage earners, (improving) occupational condi

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问题 The United States Department of Labor (enforces) laws that (promote) the welfare of wage earners, (improving) occupational conditions and (advance) employment opportunities.
选项 A、enforces
B、promote
C、improving
D、advance
答案C
解析 应为improve，与promote、advance并列。
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