听力原文：
Passage One

Many people enjoy secret codes, the harder the code the more some people would try to figure it out. In war time, codes are especially important, they help army send news about battles and signs of enemy forces. Neither side wants its code broken by the other. One very important code was never broken, it was used during world war two by the Americans. It was spoken code, never written down and it was developed and used by NH Indians. They were called the NH code talkers. The NH created the codes in their own language. NH was hard to learn and only a few people know it. So it was pretty certain that the enemy would not be able to understand the code talkers. In addition, the talkers used code words. They called a submarine and an iron fish and a small bomb thrown by hand, a potato. If they wanted to spell something, they used code words for letters of the Alphabet. For instance, the letter A was ant or apple or ax, the code talkers worked mostly in the islands in the Pacific. One or two would be assigned a group of soldiers. They would send messages by field telephone to the code talker in the next group. And he would relay the information to his commander. The code talkers played an important part in several battles. They helped the troops coordinate their movements and attacks. After the war, the US governments honored them for what they had accomplished. Theirs was the most successful wartime code ever used.
Questions 9 to 11 are based on the passage you have just heard.

Q9：What does the speaker say many people enjoy doing?

浏览四个选项，根据选项中出现的learning，searching，decoding，spreading等词可以推测，该题可能涉及要做的事情等内容。题干问的是据讲话者所说，很多人喜欢做什么。短文开头提到，很多人都喜欢密码，密码越难，就有越多的人想要破解它。故答案为C(破解秘密信息)。A项(了解别人的秘密)、B项(搜寻信息)和D项(传播耸人听闻的新闻)原文均未提及，故排除。

听力原文：
Passage One

Many people enjoy secret codes, the harder the code the more some people would try to figure it out. In war time, codes are especially important, they help army send news about battles and signs of enemy forces. Neither side wants its code broken by the other. One very important code was never broken, it was used during world war two by the Americans. It was spoken code, never written down and it was developed and used by NH Indians. They were called the NH code talkers. The NH created the codes in their own language. NH was hard to learn and only a few people know it. So it was pretty certain that the enemy would not be able to understand the code talkers. In addition, the talkers used code words. They called a submarine and an iron fish and a small bomb thrown by hand, a potato. If they wanted to spell something, they used code words for letters of the Alphabet. For instance, the letter A was ant or apple or ax, the code talkers worked mostly in the islands in the Pacific. One or two would be assigned a group of soldiers. They would send messages by field telephone to the code talker in the next group. And he would relay the information to his commander. The code talkers played an important part in several battles. They helped the troops coordinate their movements and attacks. After the war, the US governments honored them for what they had accomplished. Theirs was the most successful wartime code ever used.
Questions 9 to 11 are based on the passage you have just heard.

Q10：What do we learn about the NH talkers?

浏览四个选项，根据选项中出现的helped，write，decode，breaking等词可以推测，该题可能涉及对某些人的评价或者描述。题干问的是关于纳瓦霍族密码员，我们可以了解到什么。短文最后提到，纳瓦霍族密码员在几次战役中都发挥了巨大的作用。他们帮助军队协调他们的行动和袭击。第二次世界大战结束之后，美国政府对他们取得的成就进行了表彰。故答案为A(他们在第二次世界大战中帮助了美国军队)。B项(他们能够立刻写下口语密码)、C项(它们被指派破解敌人的密码)和D项(他们擅长破解敌人的密码)原文均未提及，故排除。

听力原文：
Passage One

Many people enjoy secret codes, the harder the code the more some people would try to figure it out. In war time, codes are especially important, they help army send news about battles and signs of enemy forces. Neither side wants its code broken by the other. One very important code was never broken, it was used during world war two by the Americans. It was spoken code, never written down and it was developed and used by NH Indians. They were called the NH code talkers. The NH created the codes in their own language. NH was hard to learn and only a few people know it. So it was pretty certain that the enemy would not be able to understand the code talkers. In addition, the talkers used code words. They called a submarine and an iron fish and a small bomb thrown by hand, a potato. If they wanted to spell something, they used code words for letters of the Alphabet. For instance, the letter A was ant or apple or ax, the code talkers worked mostly in the islands in the Pacific. One or two would be assigned a group of soldiers. They would send messages by field telephone to the code talker in the next group. And he would relay the information to his commander. The code talkers played an important part in several battles. They helped the troops coordinate their movements and attacks. After the war, the US governments honored them for what they had accomplished. Theirs was the most successful wartime code ever used.
Questions 9 to 11 are based on the passage you have just heard.

Q11：What is the speaker mainly talking about?

浏览四个选项，四个选项都是名词短语且表述的是四个不同的方面，由此可以推测，该题可能涉及文章的主旨大意。题干问的是讲话者主要讲的是什么。短文中提到，有一种很重要的密码从来没被破解，它被美国人用于第二次世界大战中。紧接着就详细描述了这种密码，故答案为C(一种从未被破解的军事密码)。A项(太平洋战争中的重要战役)、B项(战争时期秘密信息的破解)和D项(纳瓦霍印第安人对破解密码的贡献)均不是文章的主要内容，故排除。