在下面句子中填入适当的代词或副词。
1. Where have you been? The man ___ called at your office left this message to you.
2. On the bus I met a man ___ I thought might be your brother.
3. All ___ we saw and heard there left a deep impression on all of us.
4. The scene reminds me of the living room ___ I used to sit when young.
5. Don't you remember the pleasant days ___ we spent together in New York?
6. The reason ___ he failed in the exam was that he was too careless.
7. Nobody but fools can have belief in the reason ___ he gave at last.
8. Everybody present thought highly of the way ___ he carried out the experiment.
9. Let's wait until next Sunday, ___ more comrades will come to help us with the work.
10. Galileo lived in the city of Pisa, ___ there is a leaning tower of about 180 meters high.