A through came B through which could enterC at which entered D which could enter

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B

热心网友

答案:B, 无论是从时态, 介词的用法是最适合的.

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我的回答是:He walked slowly to the door (when) he (tied).

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B through which could enter他朝门那满满走去,从那他能进入阅览室.