例子： is/am was 是
⑴bring {#blank#}1{#/blank#} {#blank#}2{#/blank#}
⑵build {#blank#}3{#/blank#} {#blank#}4{#/blank#}
⑶buy {#blank#}5{#/blank#} {#blank#}6{#/blank#}
⑷catch {#blank#}7{#/blank#} {#blank#}8{#/blank#}
⑸fly {#blank#}9{#/blank#} {#blank#}10{#/blank#}
⑹lose {#blank#}11{#/blank#} {#blank#}12{#/blank#}
⑺put {#blank#}13{#/blank#} {#blank#}14{#/blank#}
⑻spell {#blank#}15{#/blank#} {#blank#}16{#/blank#}
⑼spread {#blank#}17{#/blank#} {#blank#}18{#/blank#}
⑽teach {#blank#}19{#/blank#} {#blank#}20{#/blank#}
