Learning a new language is always a challenge. There are new words, new grammar, and newpronunciation. Language is an important part of culture, and becoming familiar with (熟悉) the cultureas well as the language can make the learning experience much more enjoyable. When I was a university student, I studied Chinese for three years. Before I went to university, I hadvery little knowledge of China. Therefore, when I started learning to speak Chinese, it was important for me to also learn about China's history and culture. China's culture is very different from my own and I become interested in it soon. It will be much more fun to learn about culture when you study a new language. Culture can teach you so many things about a language. It can give you background information about the language and tell youthe history of the language. I also found out one fact, that is, if you have some knowledge about the countryand the culture, you will communicate with its people much easier. Whenever I try to learn a new language, I enjoy knowing information about the culture as well. It's a challenge to dig (挖掘) deeper for more information, but it is very rewarding!4. The underlined word "rewarding" means _______ in Chinese.[ ]A. 有益的 B. 困难的 C. 值得鼓励的 D. 实用的