instruction: Is the next sentence syntactically and semantically acceptable?

The package weighed 10 lb.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

They understand that you will prefer for the girl to put a picture on your desk.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

John has not sung a song.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

That he has met the professor is extremely unlikely.

response:
acceptable