I’ve never seen anyone run so fast---- ______ David go.

题目

I’ve never seen anyone run so fast---- ______ David go.
A.just watch B.just to watch C.just watching D.just having watched
为什么?

答案

答案：A.
翻译：--我从来没有见过有任何人跑得那么/如此快.--就去看看大卫（怎样）跑吧.
1.答语为祈使句,所以用动词原形watch开头.
just用于加强语气,可以翻译为“就/只要”,类似于耐克的广告：Just do it.
2.答语中的go其实代指的就是前句的run.