她穿得很随意，一条短裤和一件T恤衫。

She was dressed ___casually in shorts and a T-shirt.

他随口提到明年可能要搬到国外去。

He ___casually mentioned that he might be moving abroad next year.

他们一边喝咖啡一边轻松地交谈着。

They were having a ___casually conversation over coffee.