2. 外语
  3. Anyone who enters the factory floor should wear a helmet and safety vest at ______ times.

Anyone who enters the factory floor should wear a helmet and safety vest at ______ times.

admin2012-04-26  15
问题 Anyone who enters the factory floor should wear a helmet and safety vest at ______ times.
选项 A、any
B、all
C、every
D、each
答案B
解析 at all times一直，始终
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