2. 外语
  3. It is important______managers make sure all the employees comply with safety regulations at all times.

It is important______managers make sure all the employees comply with safety regulations at all times.

admin2016-01-17  10
问题 It is important______managers make sure all the employees comply with safety regulations at all times.
选项 A、to
B、what
C、that
D、upon
答案C
解析 语法：名词性从句1．空格后句子结构完整，to和upon不能作连词，因而A、D选项排除。2．It在句中作形式主语，真正的主语是空格后句子。3．从句不缺少任何语法成分，应使用连接词，因此(C)为正确选项。
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