9. We'd brought a road map without which we would have lost our way.

8. The reason why he didn’t come to school was that he got ill.

7. There are many reasons why/ for which people like travelling.

6. This is the boy whom she has taken care of.

5. Do you remember the days when/on which we stayed together?

4. The lady to whom Mr. Smith is talking lost her purse.

3. I will never forget the day on which/when I joined the league.

2. The building in which/where we put our tools is going to be rebuilt./

The building which/that we put our tools in is going to be rebuilt.

1． This is the house in which/ where a famous writer once lived.

6. The reason which he explained it sounds reasonable.

高一(上)英语必修一U nit5 Nelson Mandela---a modern hero 语法巩固　 (定语从句2) 答案