✨ ベストアンサー ✨
1 in
2 but
3 why
4 Bring me the magazines that I have left in the room.
5 I bought a knife yesterday, which I lost shortly afterwards.
6 The building whose pointed roof you can see over there is our church.
7 They were all astonished at the rapidity with which he learned to speak Japanese.
だと思います✨