题目内容

____ the workers’ working conditions, the boss will allow them to have a coffee break.
A．ImprovingB．To improveC．Having improved D．Improved
B
本题考查非谓语动词。结合句意：“为了改善工人的工作做条件，老板将允许他们停下来喝杯咖啡。”可知此处非谓语动词应作目的状语，故选B项。
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