孩子们在公园玩耍后，开始收拾玩具准备回家。

The children started to ___pack up their toys after playing in the park.

演出结束后，乐队收拾乐器准备离开。

After the concert, the band ___packed up their instruments and left.

我的电脑在关键时刻坏了，所有文件都丢失了。

My computer ___packed up at the worst possible time, and I lost all my files.