Q: Valid English sentence (grammatically) or not: What the stone did to the wall was hit it.
OPTIONS:
- unacceptable
- acceptable

A: unacceptable

Q: Valid English sentence (grammatically) or not: John is taller than that man is.
OPTIONS:
- unacceptable
- acceptable

A: acceptable

Q: Valid English sentence (grammatically) or not: I saw the one with long hair.
OPTIONS:
- unacceptable
- acceptable

A:
acceptable