instruction: Is the next sentence syntactically and semantically acceptable?

Mary regretted that she did anything to help him.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

I hope I'm not treading on anyone's toes.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Rosemary tried to get a new car.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Learning to use a language freely and fully is a lengthy and arduous process.

response:
acceptable