1. We visited the hospital ____________ I was born 30 years ago.
2.Gone are the days ____________ they could do what they liked.
3. He wrote a letter ____________ he explained what had happened in the accident.
4. I can't imagine the reason ____________ he turned down my offer.
5. We are surprised at the way ____________ he treats his parents.
6. Finally he found a cave in ____________ he could hide himself for the night.
【答案】1. where 2. when 3. where 4. why 5. that 6. which
