雅思写作常用词汇：留意/留心

　　attenton

　　-eg：I am writing to draw your attention that ... ;

　　bring sth. to sbs attention/catch sbs attention on sth;

　　complain

　　-eg: I am writing to complain about ...;

　　complain about/of抱怨某事物;

　　complain to向...抱怨。