1.which
2.who
4.where
5where
10.who
12which
13 where
II 1 We stayed in a hotel which was expensive.
2 The man whose son We play every day, is an architect .
4.Trinh Cong Son composed songs which are greatly kiked by millions of Vietnamese people.
3.She’s riding on a elephant which was carried from India.
5.On New Year’s Day, children like wearing clothes which are new and comfortable.
6.Susan’s the girl who is good at learning foreign languages.
7.Champagne is a French drink which is drunk at a New Year’s Eva party.
8- I like autumn when leaves become red and fall
9- The suitcase is too heavy which his son cannot carry it upstairs.
10- We’ll take you to the seaside where you can enjoy pure air there.