大团结章节目录2:who can help me find out the mistakes in grammer?

1, Could I get your opinions about our items ? If it(改为they) can not satisfy you , please do not hesitate to tell me , our main charge is fashion items .
we have worldwide buyer(改为buyers) now , so we have various articles , if you need to see another kind of fashion items , please give me a reply , I will send (加上them)to you for(your) reference .
2, I am sorry for bothering you in (改为at）this time(改为moment) as I know you are very busy . Because I do want to know your opinions about our items & want to give you our best service . We have more fashion items , so could I send (加上them)to you for your refer(改为referemce) first ?
3, We are charging of various ~~~ , our designers will finish new designs for(加上this) autumn & winter in(删除) this week , could I send(加上them) to your client for your reference first ?
Some of our items are sold well in other countries , It is in special design .when we put it into market , the inquires are pouring in , would you like to have a view ?
I studied your company , we have many similar articles as your website (加上does), but it(改为they) is(改为are) also diffierent , Could I send these similar items to you ?
Could you inform me(加上of) your account number so that we can send to(删除) you （加上some）samples for checking quality ?
We have stable distribution channels , and our business is open and progressive , I think that is a new opportunity for us to contact with you .