Fill in the blanks with proper prepositions. Dear Sirs, the advertisement in your web site, we have learned that you are major suppliers automobile parts Shanghai. As we are specialized the import and distribution various automobile parts, we would like to establish trade relations you. We wish inform you that we have been doing business this line f over 20 years and have wide connections automobile sellers and garages t our country. And we shall be pleased if you can send us your latest catalogue specifications and details your trade terms. We are looking forward to hearing you soon.