Question 22 is based on the passage you have just heard.

听力原文    

        Maybe you carry the most powerful passport in the world, or perhaps the rarest passport. Whatever the case, your passport will likely be one of four colors: red, blue, green or black, although there are slight variations. Switzerland’s passport is dark red, for example, (22) [while most European countries prefer a shade of red that’s almost brown.] There are no official rules regarding passport colors, (23) [but countries follow a certain set of norms when designing them.] The International Civil Aviation Organization, which works to define the principles of air travel, suggests that countries use a suitable type, size and style for official documents like passports. There are also a few compulsory aspects of passports. They must be made from a material that bends. They should be able to be read by a machine at temperatures ranging from 10℃ to 50℃ and conditions where the air can be extremely dry or moist. Despite these existing recommendations, there is nothing regarding the cover color. Why? (24) [Simply put, countries stick to darker and more conservative colors because they appear more official] and they can also hide dirt and wear. While there’s little innovation when it comes to passport cover color, the same cannot be said for the pages. (25) [The passports of many countries contain images of their well-known geographical features and wildlife, which also function as security features as some are only visible under a special light.]

22. What do we learn about most European passports?（关于大多数欧洲护照，我们可以知道什么？）

解析：C。录音中提到，大多数欧洲国家更喜欢用接近棕色的红色，C项中的a shade of red 为原词复现，bordering on brown是对录音中that’s almost brown的同义替换，故C项正确。

错项排除：录音中只提到大多数欧洲国家的护照更喜欢用接近棕色的红色，并没有说这些护照在颜色和设计上相对统一，故A项错误。B项利用录音后半部分的appear more official设置干扰，但这里是说各国都坚持使用较深、较保守的颜色，因为这样看起来更正式，并非特指欧洲护照，故B项排除。录音中提到，不管是什么情况，护照只能是红蓝绿黑四种颜色中的一种，因此并非每个国家护照的颜色都各不相同，故D项错误。