问题
选择题
In the past 10 years people have become more______ the safety of their privacy.[ ]
A. worrying about
B. cared about
C. concerned about
D. paid attention to
答案
答案：C
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In the past 10 years people have become more______ the safety of their privacy.[ ]
A. worrying about
B. cared about
C. concerned about
D. paid attention to
答案：C