Problem: Produce a sentence that would be considered grammatically acceptable (OPTIONS:
- unacceptable
- acceptable)

Answer: The twins might have both been at the party.

Problem: Produce a sentence that would be considered grammatically acceptable (OPTIONS:
- unacceptable
- acceptable)

Answer: He's fool enough to try it.

Problem: Produce a sentence that would be considered grammatically acceptable (OPTIONS:
- unacceptable
- acceptable)

Answer:
John has sung a song and Mary has too.