He swore never to repeat that mistake twice.

He goes to the gym twice a day.

The certainty of success for this project is very high.

The fidelity of this television is very high.

The popularity of that band is rapidly increasing.

The difficulty level of this game is high.

He has only received a low-class education.

The viscosity of this liquid is very high.

He is reputed to have a good outward personality.

He tried to solve the problem again and again.