2. 外语
  3. Have your files protected when working on the computer, ______ you might have them deleted by accident.

Have your files protected when working on the computer, ______ you might have them deleted by accident.

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问题 Have your files protected when working on the computer, ______ you might have them deleted by accident.
选项 A、while
B、and
C、so
D、or
答案D
解析
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大学英语三级B级

大学英语三级

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