作文中常用句套：
下文中出现的 A,B, ..., sb,
要在写作中要根据上下文进行适当替换.
开头：
Whenitcomesto ..., somethink ...
Thereisapublicdebatetodaythat ...
Aisacommenwayof ..., butisitawiseone?
Recentalytheproblemhasbeenbroughtintofocus.
提出观点：
Nowthereisagrowingawarenessthat...
Itistimeweexplorethetruthof ...
Nowhereinhistoryhastheissuebeenmorevisible.
进一步提出观点：
... butthatisonlypartofthehistory.
Anotherequallyimportantaspectis ...
Aisbutoneofthemanyeffects. Anotheris ...
Besides, otherreasonsare...
提出假想例子的方式：
Supposethat...
Justimaginewhatwouldbelikeif...
Itisreasonabletoexpect...
Itisnotsurprisingthat...
举普通例子：
Forexample,...
... suchasA,B,Candsoon
Agoodcaseinpointis...
Aparticularexampleforthisis...