• 2021-04-14
    The workers are discussing how to ____ the new machine.
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    内容

    • 0

      I wish I _____ how to operate the machine.

    • 1

      _________, the workers helped me fix the machine. A: Lucky B: Unlucky C: Luckily D: Unluckily

    • 2

      It took them a week to _________ out how to operate the machine.

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      Mrs. Carter is very happy with her new machine.

    • 4

      The ratio of the work done by the machine ______ the work done on it is called efficiency of the machine. A: against B: to C: with D: for