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

熱心網友

B

熱心網友

答案:B, 無論是從時態, 介詞的用法是最適合的.

熱心網友

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

熱心網友

B through which could enter他朝門那滿滿走去,從那他能進入閱覽室.