The little boy was last seen______football by the river.
问题描述:
The little boy was last seen______football by the river.
A.to play B.play C.played D.playing
答
选D吧.强调 那个男孩最后一次被看见的时候正在踢足球
如果选A的话强调男孩整个踢球过程被看见 与语境不太相符
是这样吧