听！她讲一口多么流利的英语啊！用英语怎么说

Listen! What good English she( is ) ( speaking )!

listen! (look!) how fluently she speaks english !
how fluent her english is!
what fluent english he speaks!

Look! She speaks fluents english.
很多英文电影里，听不是用listen,而大多数用look

she speaks english fluently。