主题句勿忘

国有其君，家有其主，文章也要有其主。否则会给人造成“群龙无首”之感!相信各位读过一些破烂文学，故意把主体隐藏在文章之内，结果造成我们稀里糊涂!不知所云!一个主题句，放在文章的开头(保险型)或者结尾，让读者一目了然，必会平安无事!

特别提示：隐藏主体句可是要冒险的!

To begin with,you must work hard at your lessons and be fully prepared before the exam(主题句)。 Without sufficient preparation,you can hardly expect to answer all the questions correctly.