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题型：单选题 题类：模拟题 难易度：普通
Last year, the product of this factory {#blank#}1{#/blank#} {#blank#}2{#/blank#} to 2,000 cars a month.
Most Americans remember what they were doing when the World Trade Center in New York {#blank#}1{#/blank#} by terrorists.
use; sailing; according to; at the time; keep
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