Read the sentences. Mariano traveled to Washington, DC, for the first time when he was in eighth grade. He thrilled to be going back. Which is the best replacement for the underlined words?

“Thrilled” describes how Mariano feels, so it needs a form of “to be” before it. “He is thrilled to be going back” is a complete, grammatical sentence. “Is thrilling” would mean he is exciting someone else.

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