People have different ways of greeting each other. They might shake {#blank#}1{#/blank#}  (hand), kiss or hug. But do you ever wonder {#blank#}2{#/blank#}dogs say hello?

    If you are a dog lover, you may know the answer {#blank#}3{#/blank#} this question.  When you arrive home, your dog {#blank#}4{#/blank#} (jump) up into your lap. It wags its tail, and sometimes gives you wet kisses.

    Like humans, dogs have five senses: smell, touch, sight, hearing and taste. Humans use sight as the main sense for {#blank#}5{#/blank#} (recognize) one another. But dogs have poor eyesight. They use smell to recognize others. A dog's sense of smell is much {#blank#}6{#/blank#} (good) than a human's. It is its sense of smell that tells the {#blank#}7{#/blank#} (different) between different people.

    Smell {#blank#}8{#/blank#} (use) by dogs to recognize other dogs too. They tell {#blank#}9{#/blank#}  differences by the smell of pee. When two dogs meet, they smell each other's noses.  Then they go side to side, and smell each other's butts. {#blank#}10{#/blank#} smelling its friend's behind, a dog knows who it is with.

    That is also why dogs smell everything they can on the road. By smelling grass, trees and signposts, dogs know which other neighborhood dogs have been around.