What is concerning us greatly is ____ the workers held up in that area yesterday will be set free. A...
2022-12-04 18:05:39 99次 2014届浙江省绍兴市高三上学期期中考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
What is concerning us greatly is ____ the workers held
up in that area yesterday will be set free.
A.
that
B. what C.
when D. which
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