他的思维敏捷，总能快速找到问题的解决方案。

His sharp ___mind always finds solutions to problems quickly.

你介意我把窗户打开吗？外面有点闷。

Do you ___mind if I open the window? It's a bit stuffy.

你能帮我照看一下孩子吗？我要去超市。

Could you ___watch my child while I go to the supermarket?

小心台阶，它们有点陡。

___Mind the steps—they're a bit steep.