大学的必要性英语作文【一】
是写信人对收信人的称呼用语。位置在信内地址下方一、二行的地方，从该行的顶格写起，在称呼后面一般用逗号(英国式，也可以用冒号(美国式。
(1写给亲人、亲戚和关系密切的朋友时，用dear或my dear再加上表示亲属关系的称呼或直称其名(这里指名字，不是姓氏。例如：my dear father，dear tom等。
(2写给公务上的信函用dear madam，dear sir或gentleman(gentlemen。注意：dear纯属公务上往来的客气形式。gentlemen总是以复数形式出现，前不加dear，是dear sir的复数形式。
(3写给收信人的信，也可用头衔、职位、职称、学位等再加姓氏或姓氏和名字。例如：dear prof. tim scales, dear dr.john smith。
大学的必要性英语作文【二】
Currently, there is a widespread concern over (the issue that__作文题目_______ .It is really an important concern to every one of us. As a result, we must spare no efforts to take some measures to solve this problem.
As we know that there are many steps which can be taken to undo this problem. First of all, __途径一______. In addition, another way contributing to success of the solving problem is ___途径二_____.
Above all, to solve the problem of ___作文题目______, we should find a number of various ways. But as far as I am concerned, I would prefer to solve the problem in this way, that is to say, ____方法_____.
大学的必要性英语作文【三】
其中在一般的社交信中，信内收信人的地址通常省略，但是在公务信函中不能。将收信人的姓名、地址等写在信头日期下方的左角上，要求与对信头的要求一样，不必再写日期。例如：
