[文法] 請教一題文法

[a125059 (阿酷潮)]

請問各位高手 有一題是這樣
You must have heard of the famous War,  which many people say ________somethin
g to do with an apple.

請問答案應該是had 還是to have呢？為什麼？
感謝指教哦

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→ ostracize: 絕對不是to have
推 monkeywife: 你先把many people say去掉應該就看得懂了
→ Tedli0111: 名詞子句
→ kangan987: 改成what many people say 你應該就看得懂了吧？