圈出单词 {#blank#}1{#/blank#}

例：t en t

 b  g     ({#blank#}2{#/blank#})

 f     d     ({#blank#}3{#/blank#})

 l      p     ({#blank#}4{#/blank#})

 p         s     ({#blank#}5{#/blank#})

 u                  a      ({#blank#}6{#/blank#})

    This is Mr. Smith. His first n{#blank#}1{#/blank#}is David. He has two sons. Bob is t{#blank#}2{#/blank#}. Jack is twelve, too. They're in the same school. Bob is i{#blank#}3{#/blank#}Class Three. Jack is in Class Four. Their m{#blank#}4{#/blank#}is a teacher of English. She l{#blank#}5{#/blank#}her pupils very much.