I looked around to see who the speaker was.

　　我四下環顧看說話的是誰。

　　The speaker worked the crowd up into a frenzy.

　　演講者把聽眾的情緒煽動得瘋狂起來。

　　She listened to the speaker with rapt attention.

　　她全神貫注地聽演講者講話。