Select the most appropriate words to fill in the blanks.
Today computer viruses spread ______ a dizzying speed ______ way of file downloads.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. at; by.
The most appropriate preposition for both blanks are at, and by.
Usage of the preposition 'at': Used to identify the object of a sentence.
Usage of the preposition 'by': To indicate the means of achieving the goal.
Usage of the preposition 'from': Used to refer to the source.
Usage of the preposition 'in': To refer to a place.
Sentence: Today computer viruses spread at a dizzying speed by way of file downloads.