✔ 最佳答案
留意,句子裡的主要動詞係was,而次要動詞係infinitive “to walk”.句子因為係問“the first man”,所以你要用was. did/do/have係要配搭另一個動詞,舉例(注意下面 < > 部份):
e.g.1. Where <do> you <like> to hang out this night?
e.g.2. What <have> you <written> on the note?
如果你想用did,who句唔會用did/do/have,動詞要直接轉做相關0既tense:
e.g.3. Who first <walked> on the moon? (你原本0個句)
e.g.4. Who <has> a spare pen to share with Johnny?
e.g.5. Who murdered the millionaire?