Question

He was too happy to say a word when he heard the news.

同义句He was ___ happy ___ he ___ say a word when he heard the news.

Answer 1

so 。。that cann't 。 He was so happy that he couldn't say a word when he heard the news 他太高兴了以至于听到那个消息时都说不出话了。 哈带笑哈．too 。。to表示太怎么了而不能，而so that 则可以在so后面加上相应的拿谈形容词表示结果，有蠢敏含异曲同工之妙。

Answer 2

同义句He was _so_ happy _that_ he _couldn't_ say a word when he heard the news.

Answer 3

依次为
so that couldn't