WELCOME Welcome to WindsorCastle, the oldest and largest occupied castle in the worlD、Windsor is one of the official residences (住所)of the Queen, who sometimes stays here. Audio tours Free audio tours are available on leaving theAdmissionCentre at the start of your visit. There is a descriptive audio tour for blind and poor-sighted visitors. Guided tours Visitors can explore the history of theCastle through a tour of the Precincts with an expert guide. Tours depart at regular intervals throughout the day from theCourtyard and finish at the en- trance to the StateApartments. Visitors with children For those visiting with children, a special family tour and various activities are offered during school holidays and at weekends. Please note permitted in the StateApartments. However, baby carriers are available to borrow. St George’ sChapel Visitors arriving at theCastle after 15:00 from march to October are advised to visit St George’ sChapel first, before it closes. Shopping Shops offer a wide range of souvenirs designed for the RoyalCollection, including books, post- cards, china, jewellery, and children’ s toys. Please ask at the Middle Ward shop about our home de- livery service. Refreshments Bottled water can be purchased from theCourtyard and Middle Ward shops. FromApril to September ice cream is also available. Visitors wishing to leave theCastle for refreshments in the town may obtain re-entry permits from the castle shops.Eating and drinking are not permitted in the StateApartments or St George’ sChapel. Photography and mobile phones Non-commercial photography and filming are welcomed in theCastle. Photography, video re- cording and filming are not permitted inside the StateApartments or St George’ sChapel. Mobile phone must be switched off inside the StateApartments and St George’sChapel in consideration of other visitors. Security As WinterCastle is a working royal palace, visitors and their belongings should get through air-port-style security checks. For safety and security reasons a one-way system operaters alone the visitor route. In the last part, a "working royal palace" refers to one______. A、still being constructed B、still used by the royal family C、where the Queen usually works D、where works of art are on show