Ⅰ.用正确的关系词或“介词＋关系代词”填空
1．I still remember the day when/on_which this country became independent.
2．The house where/in_which he lived 10 years ago has been pulled down.
3．I will never forget the day when/on_which we first met.
4．This is the reason why/for_which he refused our offer.
5．The man with_whom I talked just now is my brother.
