Which of the following sentences contains an indefinite pronoun?

A. Some of the puzzle pieces are missing.
B. Who worked on the puzzle?
C. We didn't lose the pieces.
D. They didn't they help us look.

Is it A?

Yes, A.

thank you

You're welcome.

Yes, you are correct. Sentence A, "Some of the puzzle pieces are missing," contains an indefinite pronoun. The pronoun "some" is an example of an indefinite pronoun because it does not refer to a specific number or amount. Instead, it is used to refer to an unspecified or unknown quantity of something. In this case, "some" suggests that not all the puzzle pieces are missing, but it does not provide a specific number.