Q: Valid English sentence (grammatically) or not: What John could do is not visit Sally.
OPTIONS:
- unacceptable
- acceptable

A: acceptable

Q: Valid English sentence (grammatically) or not: None of these men wants to be president.
OPTIONS:
- unacceptable
- acceptable

A: acceptable

Q: Valid English sentence (grammatically) or not: I forgot to return the book that I borrowed from the teacher.
OPTIONS:
- unacceptable
- acceptable

A:
acceptable