1. An umbrella is a thing which is useful in the rain
2. Homework is work which you do after school
3. An email is an electronic message which you send
4. The teacher is person who help you to learn
5. An album is music which is on a CD
6. A parent is a person who have a child
7. Basketball is a sport which you play on a court
8. You are a person who enjoy grammar
1. who's
2. who
3. whose
4. whose
5. who
6. who's