题目：
By traveling you can get (41) the middle of life. It is not like reading a book or watching a film, it is (42) . You can learn (43) books and films, you can have an idea about different countries and people from them, but when you travel, you get into the middle of things, you don’t only see them, but you can also touch them.
The close contact (接触) with people and with the countryside is the (44) thing in traveling. Meeting different kinds of people and visiting places that are unknown (45) you are also very (46) . You learn a lot from everybody that you meet and everything that you see. You learn about all kinds of things. And you also learn a lot about yourself: you can see what you do, how you behave (表现) in (47) places.
If you travel (48) foreign countries, you can do the same with the outer, wider world. And traveling (49) is the best way (50) learning languages. In one word, traveling is an easy way of learning.
[A] before [B] after [C] from
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C
