I did it for a bet.

　　我是為了打賭才這么干的。

　　It's his turn to cook dinner, but I bet he'll try to duck out of it.

　　輪到他做晚飯了，但我敢打賭他會想方設法逃避的。

　　The betting is that he'll get his own way.

　　他很可能會得逞。

　　We've got a bet on who's going to arrive first.

　　我們打了個賭，看誰先到。

　　What's the betting that he gets his own way?

　　你認為他可能會獨行其是嗎？

　　My bet is that they've been held up in traffic.

　　我估計他們是堵車了。