2011年1月18日应美国总统奥巴马邀请，国家 * * 胡 * * 抵达美国首都华盛顿，开始对美国进行国事访问。胡 * * 在机场发表书面讲话。他指出，建交( )年来，在双方共同努力下，中美关系总体保持良好发展势头。

A．31
B．32
C．33
D．34

The China Travel Service (or the CTS) (中国旅行社，简称“中旅社”), the first travel service of New China, is now one of the key elements in China’s travel industry. It boasts the largest travel service with the most complete and fully-functioning network in the country. Currently the CTS group has over 200 subordinate travel services, 117 hotels, 46 duty free shopping centers and 62 tourist service companies all over China.