Audiences were greatly ___ by the video class about weightle
1个回答

were greatly impressed 印象深刻

presented in Tianggon-1 space station. 是过去分词短语做后置定语修饰先行词 video class

等于: which was presented in Tianggon-1 space station

present 和video class 视频课 是被动关系, 故用表被动的过去分词

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