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Arrive late once more _____ you will be fired.
A．andB．butC．soD．or
A

試題分析：句意：再遲到一次，你就會被解雇。這里使用了固定句型：祈使句+and/or+簡單句。因為是并列關系，or表示“否則”，所以選A。
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