Before leaving the office, the last person is required to make sure all of the windows and doors are______locked.

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问题 Before leaving the office, the last person is required to make sure all of the windows and doors are______locked.

选项 A、security
B、secured
C、securely
D、secure

答案C

解析 单词形态:副词1.这是一道单词形态选择题,选项均为secure的不同形式。2.空格在be动词和过去分词之间,因此空格内应填入一个副词修饰动词。所以副词(C)securely为正确选项。
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