質問: once you choose to become an actor, many people wh once you choose to become an actor, many people who you thought were your closest friends will tell you you're crazy. 上の英文で、you thought がどのような働きをしてるのか教えてください。
回答: 挿入句です。抜いてしまうと分かります。単に親しい人、親しいとあなたが思った人、の違いになります。