It___fire,we went out.A.is B.was C.were D.being 为什么选D

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• 1.The next morning she found the man___in bed,dead.选A对么?A.lying B.lie C.lay D.laying 2.___at the station,we found the train___.答案是A为什么不选B呢?A.Arriving,gone B.Arrived,gone C.Arriving,go D.To arrive,going3.The letter___by him hasn't been posted yet.答案是A为什么不选B呢?A.written B.was written C.is written D.writing4.The___water is not fit for drinking.答案是A为什么不选B呢A.polluted B.polluting C.polluteing D.pollute 5.He took a___stick and went into the hole.答案是A为什么不选B呢A.
• It___fire,we went out.A.is B.was C.were D.being 为什么选D
• {已知f(x)的定义域为{x|x>o},且f(xy)=f(x)+f(y),若f(9)=8,求f(根号3)
• 已知y=f（x）的定义域为{x|x大于0},且f（xy）=f（x）+f（y）,若f（9）=8,则f（3）=?