speechless

当我听到这个令人震惊的消息时，我哑口无言。

I was ___speechless when I heard the shocking news.

这个令人震惊的揭露让她完全说不出话来。

The shocking revelation rendered her completely ___speechless.

第一次看到大峡谷时，我惊讶得说不出话。

Seeing the Grand Canyon for the first time, I was ___speechless.