Exercitiul 1
1. I've known my friend Paul since 1997
2. My sister has been in the hospital for several weeks.
3. Has he been wearing glasses for a long time?
4. She has not lived at home since February.
5. I haven't seen my cousin since last summer.
Exercitiul 2
1. which
2. where
3. who
4. where
5. which
6. who
Exercitiul 3
1. river
2. islands
3. mountains
4. lakes
5. forests
Exercitiul 6 (al patrulea)
1. unfashionable
2. impractical
3. informal
4. independent
5. unpopular, unpleasant