Which underlined verb in the sentence is a linking verb?

Question

I think that Clarissa will be the winner of a gold medal because she has been skating for a long time and practices every day.

Answer 1

Which verb is underlined?

Answer 2

We'll be glad to check your answer.

hittp://www.grammarinenglish.com/verbs/?lesson=linking_verbs

Answer 3

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http://www.grammarinenglish.com/verbs/?lesson=linking_verbs