Question : Select the most appropriate words to fill in the blanks.
Today computer viruses spread ______ a dizzying speed ______ way of file downloads
Option 1: by; by
Option 2: at; from
Option 3: at; by
Option 4: in; from
Correct Answer: at; by
Solution : The correct choice is the third option.
Explanation: "At" is used to indicate the speed at which something happens. In this case, it refers to the rate of virus spread. "By" here denotes the means or method through which the computer viruses spread.
Therefore, the complete sentence would be: Today computer viruses spread at a dizzying speed by way of file downloads.
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