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（plant的过去式）
plant/planted trees
植树
What did you do yesterday?
I _______(plant/planted)trees yesterday.
planted
listened
listen
听
听音乐
listen/listened music
(Listen的过去式)
What did you do yesterday?
I_______(listen/listened)music yesterday
listened
watch
watched
watch/watched TV
看
(watch的过去式)
看 电 视
What did you do yesterday?
（昨天你在做什么？）
I ____ TV yesterday.
A:watch B:watchs C:watching D:watched
D
help
helped
帮助
（help的过去式）