Từ câu 40 đến câu 45, đọc kĩ đoạn văn sau và trả lời câu hỏi:

It is an old house, about 100 years old and very small. There are two bed rooms upstairs and no bathroom. The bathroom is downstairs next to the kitchen and there is a living room where there is a lovely old fire place. There is a garden in front of the house. The garden goes down to the beach and in spring and summer there are flowers everywhere.

How old is the house?