读一读，选词填空，完成短文。
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loudest forest than
loud louder smaller
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Once there were three birds in a {#blank#}1{#/blank#}.
They were Bob, Baker and Ben. Baker was bigger {#blank#}2{#/blank#} Bob, but
{#blank#}3{#/blank#}than Ben. Bob's singing was {#blank#}4{#/blank#}, but Baker's singing was
{#blank#}5{#/blank#} than Bob's. Ben's singing was the {#blank#}6{#/blank#}.
