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    Question

    Select the most appropriate words to fill in the

    blanks. Today computer viruses spread ______ a dizzying speed ______ way of file downloads.
    A in; from Correct Answer Incorrect Answer
    B at; from Correct Answer Incorrect Answer
    C by; by Correct Answer Incorrect Answer
    D at; by Correct Answer Incorrect Answer

    Solution

    The correct answer is D

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