All the tickets ______ by the time I arrived.

Answer and explanation

Correct answer: C. had been sold

  1. Step 1: 票是「被賣出」,要用被動;賣出的時間在 I arrived 之前,用過去完成被動 had been sold。
  2. Step 2: had sold 是主動,不合票的角色。
Answer
had been sold.
Why not the others: were selling、have sold、had sold不符合題意。

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All the tickets by the… | GSAT (Taiwan University Entrance)