May be they had to ( )for a long time,sometimes for hours.A.stops_英语解答

May be they had to ( )for a long time,sometimes for hours.A.stops B.stopping C.stop D.to stop
但我不明白had to 后面不是要用动词原形吗,烦主告知具体原因.

人气：157 ℃　时间：2019-12-12 02:50:17

解答

答案A错了,应选 C.stop
因为had to 后面要用动词原形