题目内容：

    To an outsider，any culture can seem confusing.And the UK's got a thing or two that raises a few eyebrows.However，understand the why and things might be less puzzling.1..

In a world where 61％of nations drive on the right，Brits drive on the left.Why? Most people think it goes back to Medieval，maybe even Roman times.2. when you remember that right-handed people wear a sword on their left hip.Travelling on the left allowed you to  keep your weapon arm toward your opponent，who would be on your right.This practice continued until the 18th century when a law was passed requiring all traffic crossing London Bridge to keep to the left.

Visitors to the UK that have just washed their hands in an old-fashioned sink might be wondering why one tap is only for hot water，the other cold.3..So，why this oddity? It relates to a time when hot and cold water were kept separate to prevent pollution.Drinkable cold water came from a mains supply，but hot water came from attic tanks and was not considered suitable for consumption.So they were kept apart.

Millions of people drink tea worldwide，but the odd Brits put milk in theirs.Why? This mysterious practice relates to the quality of china cup used in the 18th century when tea was first imposed.For the majority of Brits，the cups available couldn’t stand the heat of the boiling water and would break，so milk was added first.4..And this practical tweak soon became a national habit.

5..As you can see，these odd Brits have perfectly clear reasons for left-hand driving，two-tap sinks and tea with milk.Even if they still seem strange，at least now you’re in the know.

A.This makes it difficult to improve

B.There is a method to the madness

C.This unusual behavior makes sense

D.You can know the origins of the practices

E.Either can make washing very uncomfortable

F.This cooled the cup enough to resist the boiling water

G.Here are the reasons for three of Britain’s more puzzling practices