单项选择题

The U.S. and the U.K. are English-speaking countries. But the English in the U.S. is different from the English in the U.K. For example, to say "去看电影", people in the U.S. say "go to the movies", but people in the U.K. say "go to the cinema". To say "裤子", people in the U.S. use "pants", but people in the U.K. say "trousers". People in the U.S. say "sure", but people in the U.K. say "of course". There are a lot of differences. But they still can understand each other.

Americans and Englishmen have difficulties in understanding each other.