the shoe is on the other foot 情况相反，情况完全不同了，今非昔比

　　Now the shoe is on the other foot. We have to change.

　　现在情况已经完全不同了，我们也必须有所改变。

　　Back at school we thought Mike was stupid. Now the shoe is on the other foot. He's made lots of money.

　　从前在学校的时候我们都觉得麦克很蠢，然而现在可今非昔比，如今他挣了好多钱。

　　疯狂练习吧！