这个孩子天生聋哑，无法说话。

The child was born deaf and ___mute, unable to speak.

这么简单的问题都答错，你真是够笨的。

You're so ___dumb to get such an easy question wrong.

看到这一幕，他惊讶得说不出话来。

He stood ___dumb with amazement at the sight.

无论老师怎么问，那个学生都保持沉默。

No matter how the teacher asked, the student stayed ___dumb.