他挠了挠自己的脑袋，觉得有点痒。

He scratched his ___head, feeling a bit itchy.

小心台阶，别撞到脑袋。

Watch the steps so you don't bump your ___head.

他戴了顶滑稽的帽子在脑袋上。

He put a funny hat on his ___head.