or

I am not sure whether he will come or not.

I am not sure whether he will come or not.

You have the option to pay by credit card or cash.

You have the option to pay by credit card or cash.

You can purchase tickets for the concert online or at the box office.

You can purchase tickets for the concert online or at the box office.

Whether we go to the beach or not depends on the weather.

Whether we go to the beach or not depends on the weather.

Do you prefer brown rice or white rice?

Do you prefer brown rice or white rice?

There are no winners or losers in this game.

There are no winners or losers in this game.

You can cook the turkey in a conventional oven or use a microwave.

You can cook the turkey in a conventional oven or use a microwave.

The successful candidate should have a degree or an equivalent qualification.

The successful candidate should have a degree or an equivalent qualification.

Is that car yours, or is it a rental?

Is that car yours, or is it a rental?