From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences. .............averag...

From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences.
.............average, 1000 vehicles cross this bridge daily

Answer Details

The correct answer is "on". The complete sentence is "On average, 1000 vehicles cross this bridge daily". The preposition "on" is used to indicate the time period during which the average number of vehicles cross the bridge.