instruction: Is the next sentence syntactically and semantically acceptable?

I wonder who what bought?

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Calvin will strike himself and Otto will too.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

She pinched his arm as hard as she could.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Bill whistled his way past the house.

response:
acceptable