Read the sentence. The flute is not as difficult to play as I once thought. Which rewritten sentence begins with an adverb? As I once thought, the flute is not difficult to play. Surprisingly, the flute is not as difficult to play as I once thought. Not as difficult to play as I once thought is the flute. It’s not as difficult to play as I once thought, the flute.

Surprisingly, the flute is not as difficult to play as I once thought.