题目内容：
请阅读Passage l，完成第21．25小题。 Passage 1
Jatenderpal Singh Bhullar, 25, is a guardsman in Britain. On Dec 11, 2012, he became the first Indian soldier to parade outside Buckingham Palace. He said wearing a turban instead of the famous bearskin was "the best moment of his life".
The historical day came as the UK's 2011 census was published. It shows nearly one in seven of the population in 2011 were foreign-born.
The increase in the number of immigrants in the country is especially obvious in London. For the first time in history fewer than half the population of London described themselves as "White British".
The top source of new immigrants to the country is India. Many other immigrants are from Poland, Pakistan, Ireland and Germany.
One major reason for the explosion in the foreign-born population is the accession of 12 countries in the central and eastern Europe to the EU, giving them the right to live and work in the UK, said the office for National statistics, which was responsible for the census.
For many immigrants the UK tends to be a good place for life and work. Kissy Meyer, 25,moved to Nottingham from Germany in 2007.
"The UK is a great place to live because everyone is so sociable. Apart from the heavy drinking, I love the outgoing lifestyle." She told The Sun.
The census results also suggested the English language could be a barrier for immigrants trying to integrate into British society. In 91 percent of households, English is the main language spoken. However, in four percent of British families, no one is brought up speaking English.
"Britain needs to do more to help integrate its immigrant population," the Labor leader Ed Miliband said in a speech in London on Dec 14, 2012.
The future labor government would make proficiency in the English language a key priority,seeking to achieve what he calls a "connected nation" rather than a "segregated one".
"We can only converse if we can speak the same language, so if we are going to build one nation, we need to start with everyone in Britain knowing how to speak English," he said.
It can be inferred that the guardsmen who parade outside Buckingham Palace__________. A．are mostly foreign-born
B．are all "White British"
C．should not wear a turban
D．usually should wear bearskins
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