孩子们玩完后，我花了半个小时收拾玩具。

After the kids finished playing, it took me half an hour to ___clear up the toys.

早晨还下着雨，但中午天气就放晴了。

It was raining in the morning, but the weather ___cleared up by noon.

经理召开会议澄清了项目延迟的原因。

The manager held a meeting to ___clear up the reasons for the project delay.