【单选题】【消耗次数:1】
It was in the United States, after 1900,____________ the automobile was improved most rapidly.
that
what
which
when
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【判断题】 答题说明:句子没有语法错误请选择“正确”,有语法错误请选择“错误”It was in United States, after 1900, that the automobile was improved most rapid.
①  正确
②  错误
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①  正确
②  错误
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③  Supreme
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①  run
②  ran
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①  正确
②  错误
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①  正确
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①  in
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①  as well as; has experienced
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①  1
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