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Water at 100 degrees centigrade.A.boiledB.boilsC.has boiledD.was boiling

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Water at 100 degrees centigrade.A.boiledB.boilsC.has boiledD.was boiling

Water _____ at 100 degrees centigrade.

A.boiled

B.boils

C.has boiled

D.was boiling

试题答案

B