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

Answer: That Chris knew the answer occurred to Pat.

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

Answer: There is only one chemical substance involved in nerve transmission.

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

Answer:
John kept behind the counter.