小题1:A
小题2:D
小题3:B
文章主旨大意：介绍了去伦敦旅游你将乘坐的交通工具和你将看到。
小题1:由“And London, the capital city, is usually their first stop.”可知。
小题2:由“The maps in the streets will show you what is around you in five-minute walk.”可知。
小题3:由 In the Natural History Museum, the key word is Big. Next to it is the Science Museum. 可知。