摘要: If you really have to leave during the meeting. you’d better leave the back door. A.for B.by C.across D.out 答案 B 解析 本题句意为:如果你确实要在会议期间离开.那么你最好从后门离开.“从后门 用by the back door.for表示原因,across表示“穿过.横穿 ,out表示“在外面 .三者均不符合句意.
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