Tom跑上前帮助那位老人过马路Tom _____ _____ to help the old man cross the road
问题描述:
Tom跑上前帮助那位老人过马路Tom _____ _____ to help the old man cross the road
答
(run) (up).为什么不是ran up
Tom跑上前帮助那位老人过马路Tom _____ _____ to help the old man cross the road
(run) (up).为什么不是ran up