单选题 .  A person with a flat. dull voice which neither rises nor falls sounds like a flat and dull person. But he or she may not be! While we can't deny the fact that people can give the impression that they are bored, anxious, friendly or angry just by the sound of their voice.
    A French friend of mine once said to me. "Your accent in French is excellent but you will never sound like a Frenchman until you put all your heart into your voice. It is a pity because you are a lively person and yet you don't sound lively to a Frenchman!"
    We learn the grammar and vocabulary and even the correct pronunciation of the foreign language, but we may forget the important emotional effect of the music of our speech. For British people, the intonation of language is attractive. That's to say, the rise and fall in the sound of our voice when we speak really matters. It's unfortunate that the intonation of some other countries can often communicate the wrong meaning.
    British people sometimes feel offended because they think the other person is unfriendly even if he has spoken a perfect English sentence! And this failure of communication can also happen between British people themselves.
    If you want to communicate successfully with another person, you may have to think about the music of your own voice. Especially when you meet someone from a different part of your country or from another country, you should be careful! Don't judge them only by their intonation.1.  What does the writer want to show through the example in the second paragraph? ______