17．聽第六段材料，回答第21至25小題．
21．What is the passage about？
A．An ad． B．A story． C．A TV show．
22．How many bedrooms are there in the big house？
A．Two． B．Three． C．Four．
23．Which is NOT mentioned near the house？
A．The supermarket． B．The library． C．The park．
24．How long does it take the children to walk to school from the house？
A.5 minutes． B.10 minutes． C.15 minutes．
25．What's the telephone number？
A.5834-7612 B.5843-6721 C.5834-6721．
