We use 'tell' without a personal object in a few expressions, that are kind of fixed expressions like tell the truth, tell the time and tell the difference.
用Tell的时候,一般带人称的宾格,只在少数固定表达中会用到,如, tell the truth实话, tell the time看时间 和tell the difference说出差异。
Okay. That's great. Okay, well, I'll let you know. Right. All right. Bye. Uh, so, Charlie Bingham just invited us over...to his beach house for a little get-together.