这个奖项如此荣幸且出乎意料——我惊讶得说不出话来。

This prize is such an honour and so unexpected - I ___am ___lost ___for ___words.

我如此愤怒，以至于很长一段时间都说不出话来。

I was so enraged that I ___was ___lost ___for ___words for quite a long time.

当他听到这个消息时，他感动得说不出话来。

When he heard the news, he ___was ___lost ___for ___words with emotion.