I've never seen anyone run so fast...I've never seen anyone run so fast, _____ David go.A. just watch B. just to watch C. just watching D. just having watchedI've never seen anyone run so fast----_____ David go.A. just watch B. just to wa

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I've never seen anyone run so fast...
I've never seen anyone run so fast, _____ David go.
A. just watch B. just to watch C. just watching D. just having watched
I've never seen anyone run so fast----_____ David go.
A. just watch B. just to watch C. just watching D. just having watched
请问这两道题的答案分别是什么?有什么区别?

第一题接的不是完整的句子所以不可以接逻辑谓语即接非谓语
第二句中有破折号所以加的是逻辑谓语
这就是两题的区别

第一句指的是“只是David跑在前面”,选D
第二句指的是“不去管别人的,只看David跑。”

D,C我也不确定,你参考下