{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} {#blank#}4{#/blank#} that it is necessary to know some knowledge of first aid as dangers lie everywhere.

The incident had reached to a {#blank#}1{#/blank#} {#blank#}2{#/blank#} both their parents were to be called in.

He is always helping people without expecting anything{#blank#}1{#/blank#} {#blank#}2{#/blank#}.

Parents are {#blank#}1{#/blank#}children's bad temper nowadays.

参加会议的人非常感激为他们提供的信息。