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The dog is man's best friend.He can do many things for us.He can protect our homes.He can guide the blind.He is loyal to his master and never asks for a pay raise(加薪).
The dog has also made many contributions to English.For example,if there were no dogs,how could a husband tell his wife her cooking tasted like a dog food?Hou could the weatherman say,"It's raining cats and dogs?"So the next time a dog lifts a leg to your bicycle,don't kick him,Bend down and say,"Take your time"

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It's raining cats and dogs 下倾盆大雨