麻烦各位大神帮忙写一封英文签证解释信，内容大致如下：
我叫……，今年2月份我将去奥地利维也纳应用艺术大学参加园林专业的入学考试，我将提前一周赴奥地利适应一下当地环境，以便参加接下来为其四天的考试，考试之后的两周内我将不得不呆在奥地利等待考试结果，因此我需要申请四个州的签证
谢谢了
Dear Sir,
My name is xxxx, I will be going to Universität für angewandte Kunst Wien of Vienna in February to sit for the entrance examination of Landscape Architecture course. I shall reach Austria one week in advance to familiarize the local environment to get ready for the 4-day examination; after that, I am compelled to stay on for another two weeks to wait for the result of the examination. So I wish to apply for a 4-week visa to Austria.
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