A
One of the most exciting and interesting international cities to visit is London，England.Here is a look at four free things to do during a vacation to London.
Visit the Trafalgar Square
Built more than 200 years ago，Trafalgar Square is a popular gathering place for locals and travelers，too.The area is close to good shopping and dining opportunities，and there are usually some sorts of public events or celebrations going on there during most weekends.
Wander along the Thames
Visitors wanting to see some great architecture，attractions and views should spend an afternoon walking along the River Thames.The best place to start is at the worldfamous London Bridge crossing over the river and you can walk all the way to Westminster Bridge a short distance away.Travelers doing this will find themselves passing by a great many historic buildings.
Explore the Local Markets
While purchasing items at any of the open markets in London is not necessarily free，walking through them to view the merchants (商人)，their products and the other shoppers is of great fun.Some of the popular open markets in London worth visiting include Spitafields Market，Portobello Road Market and Leadenhall Market.
Visit the British Museum
One of the top museums in the entire United Kingdom can be found in London，and it charges no admission (入场费) for entry.This museum is so highly regarded that it is not only popular with locals and tourists，it is also seen as a major and valuable scholarly resource.
这是一篇应用文。文章主要讲述了在伦敦度假期间四处可以免费参观的旅游景点。
21．What can we know about the Trafalgar Square?
A．It borders the Thames.
B．It has a history of over three centuries.
C．There are many factories around it.
D．From here visitors can easily do some shopping.
答案：D
解析：细节理解题。根据第二段“The area is close to good shopping and dining opportunities”可知，Trafalgar Square靠近购物和饮食中心，所以人们很容易购物，故D正确。
22．What will attract visitors' attention while they're walking along the Thames?
A．Some old trees. B．Local products.
C．Great restaurants. D．Famous buildings.
答案：D
解析：推理判断题。根据文章第三段最后一句“Travelers doing this will find themselves passing by a great many historic buildings.”可知，游客在泰晤士河漫步时可以看到很多历史建筑，故D正确。
23．We learn from the text that ________.
A．London Bridge is far from Westminster Bridge
B．Portobello Road Market is located in Manchester
C．the British Museum is a major and valuable scholarly resource
D．visitors should pay some money to enter the British Museum
答案：C
解析：细节理解题。根据文章最后一段“This museum is so highly regarded that it is not only popular with locals and tourists，it is also seen as a major and valuable scholarly resource.”可知，大英博物馆被认为是有价值的学术资源，故C正确。
