Which sentence contains an infinitive error in the ought-to versus should and had-better advice contrast?
The editor should verify both quotations against the interview recording.
We had better save the route offline before the signal disappears.
The accountant ought check the tax code before submitting the return.✓Correct answer
You ought to replace the frayed climbing sling before the next trip.
Explanation
The sentence about the accountant is erroneous because ought requires to before the verb. Should verify and had better save correctly use bare forms, and ought to replace correctly supplies the missing marker.