孩子们在结冰的湖面上快乐地滑冰。

The children are happily ___skating on the frozen lake.

孩子们在结冰的湖面上滑冰玩耍。

The kids were happily ___skating on the frozen lake.

经理一直在回避讨论加薪的问题。

The manager kept ___skating around the topic of salary increases.