중2 지학 문제집 문장 문제 질문

다음 보기 중 정답은 2번이라고 하는데, 나머지는 왜 틀렸는지 설명 부탁드려요.
1. The man has a garden of his own.
2. The woman is a school teacher.
3. The man asks the woman about the size of the garden.
4. Only the students can take care of the flowers.
5. The garden was made by students.