(Viên chức Mầm non) 5000+ câu trắc nghiệm Ngoại ngữ có đáp án - Unit 11
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These calculations used to be done with slide rules; now it is done by a computer. __________________________________________________________________________

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These calculations used to be done with slide rules; now it is done by a computer.

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Giải thích

These calculations used to be done by men; now they are done by computer.