I. The air, which consists of various elements, surrounds us.
2. I had a stick, which I defended myself with.
3. "four brother, to whom I was introduced yesterday, surprised
me with his learning.
4. Silk, which the Chinese had the merit of discovering, is
much worn in Europe.
5. The palace which/that the Queen lives in is magnificent
(The palace in which the Queen lives is magnificent).
6. You have told me something which/that I shall not forget.
7. Bill came home on a certain day which/that I do not
remember.
8. The bridge that/which 1 passed over yesterday is very
high.
9. The water, which 1 tasted, is very refreshing (non-identifying
clause)/The water which/that I tasted is very refreshing
(identifying clause).
10. The picture, which the artist took a long time to paint, is
very fine.
11. The climate that/which prevails in India is very warm.
12. Rats, which multiply very fast, do much damage.
13.I gave the money that/which I had on/about/with me to
a beggar.
14. He did not like the bread that/which I was in the habit of
eating.
15. Show me the book that/which you have read.
16. The sun, from which our light comes, is far away.
17. Steel pens, which were invented long ago, last a long
time.
18. The ship aboard which Columbus crossed the Atlantic
was very small.
19. The microscope, which we see invisible objects
with/with which we see invisible objects, is very useful.
20. The nineteenth century, in which machinery came into
use, was called the age of machinery.
21. The swallows which I saw yesterday, were assembling for
the night.
22. The cup that/which the servant broke was very old.