Little Duck is {#blank#}1{#/blank#}（watch）the sun going down. It is {#blank#}2{#/blank#}（get）lower and lower, but his shadow is getting {#blank#}3{#/blank#}（long）and {#blank#}4{#/blank#}（long）.

    “Why is that?” Little Duck asks his friend Old Tree, “You are {#blank#}5{#/blank#}（old）and {#blank#}6{#/blank#}（small）than me. Tell {#blank#}7{#/blank#}（I） why is my shadow longer when the sun gets lower?”

— _______a duck!

—Some of __ are skating.

— Yes,  (it/ this) is.