19.I’ve never seen anyone run so fast--_____ David go.A.just watch B.just to watchC.just watching D.just having watched知识点是什么?
问题描述：
19.I’ve never seen anyone run so fast--_____ David go.
A.just watch B.just to watch
C.just watching D.just having watched
知识点是什么?
答
a
答
a 就是一个祈使句
答
答案a “--”是破折号 后面的表示说明
而这里的内容显然是祈使句