What's he like? I bet he's really dreamy.

他长得如何？我敢说他一定很俊。

《牛津词典》

I bet he forgot about the meeting.

我打赌他已经忘记了这个会议。

youdao

I bet he let slip that I'd gone to America.

我确信他无意中说出了我已去了美国。

《柯林斯英汉双解大词典》

I bet he's smart. Is he smart?

VOA: standard.other

And so he gets in the backseat and he says, "I bet you can't guess who I am."

他坐在后座里，然后说:“我打赌你猜不出我是谁。”

记忆犹新的乘客 - SpeakingMax英语口语达人

Anyways,I will risk forty dollars and bet you that he can jump farther than any frog in Calaveras County."

VOA: special.2009.08.29

We didn't ask him, but I bet he has a composting toilet.

BBC: Newsnight's clock ident

"I bet he'd be awesome, " Stewart said.

WSJ: Those Wacky Yankee Lineups

The Pro has his office in Jersey City and I bet he hurls the occasional imprecation about it when he is not busy railing about the idiots in Congress who make a mucking fess out of the tax law, reality TV and the GD extensions that prevent him from spending all his time outside of tax season blogging and going to musicals.

FORBES: The Wandering Tax Pro's 9/11 Tribute