instruction: Is the next sentence syntactically and semantically acceptable?

I think Anita may have poisoned the meatballs which Sasha is gobbling down dumplings faster than I can reheat.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

If students study hard, teachers will be happy.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

We believe that he is quite reasonable.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

John asks whose book his son likes.

response:
acceptable