✨ ベストアンサー ✨
Could you tell me where did you get the book?
→ Could you tell me <where you got the book>? <間接疑問文> = Could you tell me? + <Where did you get the book>?
We visited the castle, which is said that it is the oldest in the country.
→ We visited the castle, which is said to be the oldest in the country.
※S be said to ~ Sは~であると言われている
参考にしてください。
You're welcome!😊
ありがとうございます🙇♀️