One way to tell whether your friends are true is to travel with them.
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Mister MicawberOne way to tell whether your friends are true is to travel with them.Can we use 'to know' instead of 'to tell'?Thank you.
AnonymousCan we use 'to know' instead of 'to tell'?You may, but you asked for usage. 'Tell' is more common there. Learners often use 'know' when better verbs are available.