4. 答案

　　D

　　解析

　　细节理解题。根据文章最后一句中的but prospects for salary and growth remain strong可知，商业飞行员的就业前景很好，故答案为D项。

　　5. 答案

　　C

　　解析

　　推理判断题。根据Electricians这一部分中的Major cities promise the most jobs可以推测出答案。根据短文大意可排除A项；根据文章内容可知本文主要讲没有大学文凭，你照样可以找到一份好工作，但并不是说获得大学文凭是没有必要的，故排除B项；根据第一段中的Others choose not to continue their schooling for other reasons，可排除D项。

　　Ⅲ.语法填空

　　The task of being accepted and enrolled in a university begins early for some students. Long before they graduate ___1___ high school, these students take special courses to prepare for advanced study. They may also take one or more examinations that test ___2___ well prepared they are for the university. In the final year of high school, they complete ___3___(apply) and send them, with their student records, to the universities ___4___ they hope to enter. Some high school students may be required to have an interview with people from the university. ___5___(neat) dressed and usually very frightened, they are determined to show that they have a good attitude and the ability to succeed.

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