Question

1. fill in the blank:

a contraction uses an apostrophe to replace ______.
word bank: titles, phrases, commas, periods, capitals, letters

Explanation:

In contractions, an apostrophe is used to replace one or more letters. For example, in "don't" (contraction of "do not"), the apostrophe replaces the letter "o" from "not". The other options (titles, phrases, commas, periods, capitals) do not fit the function of an apostrophe in contractions.

Answer:

letters