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. I never knew I coul...

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.
I never knew I could be so fast...........I entered the competition.

Answer Details

The correct answer is "until". "Until" is used to indicate the time up to which a particular situation or event will occur. In this context, it means that the person never knew they could be so fast until they entered the competition.