我刚打开烤箱，蛋糕就弹出来了。

As soon as I opened the oven, the cake ___popped out.

当我打开礼物盒时，一个弹簧玩具突然弹了出来。

A spring toy ___popped out when I opened the gift box.

木板上的钉子突出来了，可能会划伤手。

The nail in the wood ___popped out and might scratch your hand.