e anxiety to please a boss, and no more worries about being laid off because you are getting old.
文中有4个词的短句:first, teaching is learning. 也有27个词的长句:to make my lectures more interesting, i have to read more books, explore new knowledge and gain a better understanding of the world-the very thing i like to do in my life. 有简单句,也有复杂句:as a teacher, i can freely express my opinions and explain them in my own way since nobody will interfere with me; 还有同位语句，断裂句，排比句，比较句等,因而文章读起来节奏感强。所谓句子变化，主要是指句子的开头要有变化，句子的结构要有变化，句子的长度要有变化。不要连续使用几个简单句，要学会使用复杂句。
例子2
a) teenagers are pressured by school work. they are
also encouraged by their peers. under such
circumstances, they resort to smoking. but sometimes
they feel a little guilty.
b) pressured by school work and encouraged by their
peers, teenagers often resort to smoking, tough
they feel a little guilty sometimes.
不要总是以有生命的名词和人称代词开头(受汉语表达习惯的影响,不少考生都喜欢以i，people，we等开头)。