题目内容：
根据以上材料，回答问题。
What is the reason I that the Englishman to enter into a conversation?
A．Because the English have developed many different attitudes and habits．
B．Because living on an island separated from the rest of Europe has much to dowith it．
C．Because the English are quiet sky and reserved
D．Because an Englishman often seems uneasy even embarrassed when he meets with strangers or foreigners
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