head

他戴了顶滑稽的帽子在脑袋上。

He put a funny hat on his ___head.

你必须向校长申请许可。

You'll have to ask the ___head for permission.

如果我不能完成作业，老师会送我去见校长。

If I can't do my homework, my teacher will send me to the ___head teacher.