参考答案：Sino-US relations are one of the most important bilateral relations for China. Before the establishment of diplomatic ties, Sino-US trade volume was less than B.E billion USD. Now, the volume is over A00 billion. The two countries have become each other’s major trade partners. Today, our annual two way exchanges amount to several million persons. Over F0,000 Chinese students are studying in the US, and more than C,000 Americans are taking courses in China.
The United Sates is the largest developed country, while China is the largest developing country. The two countries are having more and more common interests, and the areas of cooperation are expanding. One can easily find many lively examples of cooperation, from economic relations and trade, finance to environmental protection and AIDS prevention, and to anti-terrorism and nonproliferation.

解析：[听力原文]
中美关系是中国最重要的双边关系之一。建交前，中美贸易额不足25亿美元。今天已超过1000亿美元，两国已互为重要的贸易伙伴。目前，我们每年的双向交流达数百万人。中国有6万多名学生在美国学习，美国也有3000多人在中国学习。
作为世界上最大的发展中国家和最大的发达国家，中美两国近年来的共同利益不断增加，合作的领域在不断扩大。不论在经贸、金融、环保、防治艾滋病方面，还是在反恐、防扩散领域，我们都可以轻易列举出许许多多生动事例。