1.I’mverygladtohavereceivedtheletteryousentmetwoweeksago,

　　sent,me中间加tosentto固定短语

　　2.Ihavebeenthinkingaboutaquestionyouaskedme.

　　aquestion中a改the问题特指,所以用the

　　3.Inmyopinion,youshouldgobackafteryoufinishyourstudiesabroad.

　　go改come根据题意,应该是学成归来

　　4.Foronereason,thatyouarestudyingisbadlyneedednowadaysinourcountry.

　　that改what这里用what引导主语从句

　　5.Itwillbequiteeasilyforyoutofindagoodjob.

　　easily改easybeeasy（adj.）

　　6.Iknowafewbigcompanyhereinourcityhopetohirepeoplelikeyou.

　　company改companies,afew一些,用于可数名词复数形式前

　　7.Foranotherreason,Ithinkitwillbeverymuchmoreconvenientforyoutolookafteryourparentsastheyaregettingold.

　　very去掉,moreconvenient是比较级,much可以用于比较级前

　　8.Thereforethisisonlymypointofview.

　　Therefore改Anyway,此处没有因果关系,因此therefore不恰当,anyway,不管怎样,符合句意

　　9.Itisupforyoutomakearightchoice.

　　for改toitisuptoyou由你决定,随你的便