帮我看看2,3句英文有没有语法错误,在线等,快

最好在第一句的letter后面加上个in which,
send-sent
because去掉
will-may
few-a few(few表示否定，指几乎没有)
waiting-wait

语法王来了。
-then- I went to the post office and -sent- a new one. Because I am in China now, so- the EMS will take few days to Chicago. Please waiting- for that

没有then,sent,没有so,wait,

我的意见是：
Since i'm in China, it will take a few days to Chicago.Please wait for that!
Thank you so much!
"since"有时可以解释为“由于”“it will take + some time+ to do sth.”是一个句型“花费一些时间去做某事”
since 这是一封寄往国外的信，客气一点是有益无害的！！
祝你顺利换回dvd!!

别扭啊 别扭
In your last letter you said my DVD was damaged.So i went to the post office and sent a new one to you.Because i'm in china now,so it will take a few days to reach chicago.i hope you could wait patiently

I have read your letter,It tells me that my dvd was damaged.I went to the post office and send more one again，in time.I am in China now,so the EMS will be late.please wa