It is in view of our long friendly business relations that we e_______ you this a__________. We sincerely hope that we can enlarge the business in these lines to our mutual benefit.
【简答题】阅读理解。 What do pen pals write in the letters? In the children's letters, they often write about their school days, hobbies, and favorite stars. They may be from different(不同的)countries, and they may ha...