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【单选题】
It is nearly half a year since we____to prepare for the grand exhibition.A.
begin
B.
have begun
C.
began
D.
will begin
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举一反三
【单选题】which class of fire should burning diesel oil be treated as?
A.
Class ‘C’
B.
Class ‘D’
C.
Class ‘B’
D.
Class ‘A’
【简答题】Burning light metals should be treated as which class of fire?
【单选题】Burning diesel oil should be treated as which class of fire?
A.
Class 'A'
B.
Class 'B'
C.
Class 'C'
D.
Class 'D'
【简答题】Burning generators should be treated as which class of fire?
【简答题】Burning diesel oil should be treated as which class of fire?
【简答题】Burning wood should be treated as which class of fire?
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