答案　A　[细节理解题。从第六个小标题下面的第三句话Visitors wishing to leave the Castle for refreshments in the town may obtain re­entry permits from the castle shops找到答案。]

　　4．Why are visitors required to turn off their mobile phones?

　　A．To ensure the safety of others.

　　B．To ensure the security of the Castle.

　　C．To prevent them from disturbing others.

　　D．To prevent the use of the built­in cameras.

　　答案　C　[细节理解题。从Photography and mobile phones中的最后一句话in consideration of other visitors.找到答案。]

　　B

　　Homestay provides English language students with the opportunity to speak English outside the classroom and the experience of being part of a British home.

　　What to Expect

　　The host will provide accommodation and meals. Rooms will be cleaned and bedcovers changed at least once a week. You will be given the house key and the host is there to offer help and advice as well as to take an interest in your physical and mental health.

　　Accommodation Zones

　　Homestays are located in London mainly in Zones 2, 3 and of the transport system. Most hosts do not live in the town centre as much of central London is commercial and not residential(居住的). Zones 3 and 4 often offer larger accommodation in a less crowded area. It is very convenient to travel in London by Underground.

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