单项选择题

The children () many times not to go near the fire.

A. have told
B. told
C. have been told
D. were being told

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()no air or water, there would be no life in the world.

A. There was
B. There were
C. Is there
D. Were there
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Don't be careless again, ()

A. will you    
B. are you    
C. did you    
D. do you
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