I have never seen anyone run so fast- __David go.__上填just watch.老师让我讲填watch的原因.

问题描述:

I have never seen anyone run so fast- __David go.__上填just watch.老师让我讲填watch的原因.
I have never seen anyone run so fast- __David go.__上填just watch.老师让我讲填watch的原因.选项中还有just watching.just to watch.just having watched

-破则号表示句子结束, 后面需要填一个完整句子
填watch构成祈使句, 其他都不能构成完整句子.
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