C次の各組の文がほぼ同じ意味になるように, ( )内に適切な語を書きなさい。
This is the hotel we stayed at last summer.
1
This is the hotel (
) we stayed last summer.
Do you know the reason for which he came late?
2
Do you know the reason(
) he came late?
I'll never forget the day when we got married.
3
Ill never forget the day (
) we got married.