改革开放30多年来，西藏通过深化改革和扩大开放积极推动全区商业、对外贸易和旅游产业加快发展，不仅增强了与内地的交流，同时也加强了与世界的联系和合作。
1993年，西藏与全国一道开始建立“框架一致、体制衔接”的社会主义市场经济体制，深化物资、粮食、日用消费品等领域价格流通改革并全面进入市场。目前，西藏已经深深融入全国统一的市场体系，来自全国和世界各地的商品源源不断地进入西藏，丰富着城乡市场和百姓生活。西藏的名、优、特产品及民族手工业产品，大量进入全国市场。
西藏与世界的经济联系日益密切。2012年，全区进出口总额为34.24亿美元，是1953年0.04亿美元的850多倍，年均增长12.1%。截至2012年底，西藏实际利用外资4.7亿美元。西藏立足区位优势，加强与印度、尼泊尔等周边国家的友好合作，实施面向南亚的陆路贸易大通道建设，大力发展边境贸易。

If the jewelry is marked 14 parts of gold mixed with 10 parts of base metal, it will always bear __ mark.
A．a ***
B．a 10K
C．an 18K
D．a platinum

What is the man's problem？
A．He is taking too many classes this semester.
B．He is failing one of his required courses.
C．He has a problem with his academic advisor.
D．He took classes with heavy reading assignments.

Some philosophers insist that one way to __ knowledge is through an empirical approach.
A．disseminate
B．classify
C．test
D．acquire

Mr. Li is __ Mr. Wang.
A．as tall or taller
B．tall as or taller than
C．taller or as tall as
D．taller than or as tall as

The word they in the passage refers to
A．academies.
B．conventions.
C．members.
D．ideals.