U4 I Know This City!国家 首都 语言 国旗 What national flag is this?What's the capital of China? The capital of China is Beijing.It's the national flag of China. It's the Chinese national flag. What national flag is this?It's the British national flag. It's the national flag of Britain/ the UK. What's the capital of Britain/ the UK? The capital of Britain/ the UK is London.Country: America National Flag:New York The biggest city in America.Capital:Washington D.C. Countr..