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题型：单选题 题类：常考题 难易度：普通
keep……to oneself; in the end; in half; be worried about; run away from
Though this bridge {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} wood, it's still very strong.
The teacher told the students to {#blank#}1{#/blank#}hard {#blank#}2{#/blank#} and never give up.
They {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} {#blank#}4{#/blank#} what I did that they asked me to start working the next day.
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