高中教育高考英语2012高考英语二轮复习专题限时训练(湖南专用)28 社会生活型阅读理解(2)
题目内容

Some years ago safety rules________.

2024-07-14

A.were put forward due to scientists’ recommendations

B.came into being as a result of the workers’ demands

C.were introduced because quite a number of people were killed or seriously injured

D.were effective enough to protect workers and customers

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