Fill each gap with the most appropriate option from the lists provided.By this time next year, I _____ twenty years old?

Fill each gap with the most appropriate option from the lists provided.By this time next year, I _____ twenty years old?

Answer Details

The most appropriate option to fill in the gap is "will be". The speaker is talking about a future event, which is their age in a year's time. "Will be" is the simple future tense and it's the most appropriate option to indicate a future event that is certain to happen.