填空题

Mary couldn’t have received my letter; ______________ (否则她在这之前就会给我回信的).

【参考答案】

otherwise she would have replied before now

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填空题

The computer can provide a correct number，but it may be an irrelevant number until judgment is pronounced

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I was advised ______________ (或者打电话，或者写信给该旅店订房).