他们在讨论关于旅行的计划。

They are talking ___about their travel plans.

我每天大约走1万步。

I walk ___about 10,000 steps every day.

我的钥匙大概在沙发周围某个地方。

My keys are ___around the couch somewhere.

他正准备明天的演讲。

He is ___about to prepare for tomorrow's speech.