There are differences between British and American English in spelling and vocabulary. Pronunciation is sometimes different. 这三句说明美国英语和英国英语在语法、拼写、词汇和发音方面都有差异，故D项正确。

　　3．What is not mentioned(提及) in the passage？__C__

　　A．Whether there are differences between British English and American English.

　　B．Whether British English and American English are one language or two.

　　C．How the differences between British English and American English came about.

　　D．How important the differences are.

　　解析：细节题。在第二段中提及了两国英语之间的确存在着差异；文章最后一句话告诉我们这是一种语言，最后一段也说了这种差异是多么重要。唯独没有提及这种差异是如何产生的。故C项正确。

　　4．Most __B__ say "Do you have a watch？"

　　A．British people B．Americans

　　C．children D．teachers

　　解析：细节题。根据第二段第四句话Americans say"in the hospital" and "Do you have a pen？"说明Do you have a watch？是讲美国英语的人所说。故B项正确。

　　5．According to this passage, British people and Americans have __A__ difficulty in understanding each other.

　　A．little B．much

　　C．some D．great

解析：推理题。根据文章最后一段For the most part, British and