孩子们在森林里发现了一个天然的土坑。

The children found a natural ___pit in the forest.

这个煤矿已经开采了50多年。

This ___pit has been producing coal for over 50 years.

我们买到了靠近乐池的座位。

We got seats near the ___pit for the concert.

桌面上有一个小坑，可能是被重物砸的。

There's a small ___pit on the tabletop, probably from something heavy.