I often saw the boys （）in the river.AI often saw the boys （）in th_英语解答

I often saw the boys （）in the river.A
I often saw the boys （）in the river.A.sawm B.swimming C.to swim D.swim

人气：352 ℃　时间：2020-02-15 12:59:06

解答

选D
often是经常发生的,所以用see sb.do sth.
如果是瞬间发生或者正在进行,用doing