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        1. — Excuse me, sir, smoking          in the gas station.
          — Oh, I'm really sorry.
          A. doesn't allow      B. isn't allowed       C. aren't allowed
          B

          試題分析:句意:---打擾了,先生,在氣站不允許吸煙。---奧,真的對不起。doing sth. be allowed 做某事被允許。Smoking做主語用系詞be的三單形式。故選B.
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