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When an army officer gives a command, his men and women must follow it.

Acomma

Border

Cquestion

Dpresent

 

答案:B
解析:

Command命令的意思

 


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Modcm inventions have speeded up people’s lives amazingly. Motor-cars cover a bundred miles in little more than an hour. Aireraft cross the world a day, while computers operate at lightning speed. Indeed, this love of speed seems never-ending. Every ycar motor-cars are produced which go even faster each new computer boasts(吹嘘)of saving preeious seconds in handling tasks.
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