instruction: Is the next sentence syntactically and semantically acceptable?

A professional dancer would be able to do it.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Student studies English for 4 hours a day.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

You may pick absolutely any flower.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

He turned off the light.

response:
acceptable