There are differences for example in spelling, vocabulary, grammar and pronunciation. Here are few links with good examples: http://oxforddictionaries.com/words/british-and-american-spelling http://oxforddictionaries.com/words/british-and-american-terms http://learnenglish.britishcouncil.org/en/grammar-reference/british-english-and-american-english

This is a tricky one. As far as I know, in a situation like this, this is how it goes... "He told us __there was__ one man and six women applying for the job." "He told us __there were__ six women and one man applying for the job." So the word that follows the verb determines the verb... I agree with you...English is hard...

D is correct, and yes, if A was rewritten as you suggested, it would also be ok.

Go see for example: http://www.englishclub.com/business-english/correspondence-samples.htm OR http://www.writing.wisc.edu/Handbook/BusinessLetter.html

be willing (to do sth) = to be happy to do something if it is needed

As far as I know it is bacause of the verb DO. It is something like this: If there is two auxiliary verbs in the sentence (in this case DO+HAVE) the latter one does not conjugate in person. *Sorry, can't remember the whole grammatical explanation by heart.* See examples: WITHOUT DO: The father has a job. WITHOUT DO: The father hasn't got a job. WITH DO: The father doesn't have a job. WITH DO: The father does have a job.

I would say it depends on the situation: who benefits the most. I = lucky, example: "Lucky you were here. I really needed to see you anyway." You = lucky, example: "Lucky you were here. Now you were able to see her in person."

ミナ Mina イマン Iman オミドゥ Omidu --> Omid ミトゥラ Mitura --> Mitra アボルファズル Aborufazuru --> Abolfazl