with a light to tell whether it's open or shut.

Two old people, in the falling dusk, waiting for someone to tell them whether they would need to flee their home.

"Can you tell me now whether all of these bullets were fired from the same pistol?"

Although you'd need to define art to be able to tell whether one thing or another did not qualify.

Long-term studies are the only way to tell whether a medicine or supplement works and is safe.

"Could I trouble you to tell us whether it's far to the railhead?"

Not being able to tell whether breathing is becoming worse.

"Will you tell me whether the boy is a danger to me?"

"Can you tell us whether this was sold here?"

"Can you tell whether he knows of your special abilities?"