A、9%. B、16%. C、30%. D、40%. D四个选项均涉及百分比，可以预测应该跟数字比例有关。讲座介绍了五种不同的听的方式，并举例说明了这些方式如何在不同条件下使用。讲座开头提到“一般人们会把40％的交际时间用来听”，因此D项“40％”为正确答

Listening is one of the first things we learn to do and one of the things we do most. [23] The average person spends 9% of their daily communication time writing. 16% reading, 30% speaking, and 40% listening. Students spend most of their school time listening, up to 60% according to some studies. Yet despite its importance, we usually take our ability to listen for granted. As we have already said, though, listening isn’t easy. The fact is we have different listening styles for different occasions. How successful we are as listeners may depend in part on choosing the right listening style for the situation. [24] Perhaps the most basic listening style is appreciative listening. We listen appreciatively when we enjoy music, a birds’ song or the murmur of a book. We need a different style, one called discriminative listening. When we want to single out one particular sound from a noisy environment, you discriminate, for example, when you listen for a friend’s voice in a crowded room. We use a third style of listening: comprehensive listening, when we want to understand. When we listen to directions or instructions, we are using this style. The fourth learning style is more complex, therapeutic listening. The style practice by counselors, psychiatrists, and good friends encourages people to talk freely without fear of embarrassment. Friends act as our sounding boards, when we just want someone to listen. The therapeutic listener in conversation with a troubled friend accepts what he said, tries hard to understand, and above all makes no judgment. The fifth style, critical listening, is the one we will examine most closely. Critical listeners are the most active of all listeners, because they are working hard to decide whether what someone else says makes sense. [25] Critical listeners evaluate what they hear and decide if another person’s message is logical, worthwhile or has value. We need to be critical listeners, when someone wants us to buy some things, vote a certain way, or support a particular idea. We also need to be critical listeners in school, where listening and thinking are almost identical.
    23. What is the percentage of daily communication time an average person spends on listening?
    24. What is the most basic listening style?
    25. What does a critical listener often do?