✨ ベストアンサー ✨
Is this the song (which) you like very much?
This is the cake (which) I made last night.
Please show me the pictures you took yesterday.
I know the man who met in the park.
There are the books he bought yesterday.
Was the question you asked hard?
だ、と思います！間違ってたらごめんなさい( .. )
ありがとうございます！