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    【题目】Many scientists believe that robots __________ able to talk like humans in 50 years.

    A. wereB. are

    C. will beD. have been

    【答案】C

    【解析】

    考查时态。句意：许多科学家认为，五十年过后，机器人将能够像人类一样说话。描述＂五十年后＂将要发生的动作或状态，用一般将来时态。故选C。

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