His name was on the ____ of my tongue,but I just couldn't remenber it.

问题描述:

His name was on the ____ of my tongue,but I just couldn't remenber it.
____填tip,为什么?

这该是个选择题啊,选项里面应该有个tip,tip是舌尖的意思吧,说话的时候舌尖是最前面的.呵呵.