Use of English PRO

Students of English all (0) OVER the world are aware that there are differences (1) ............ British and American English. But how large are the differences really ? The varieties of English have historical roots. (2) ............ pilgrims left England in the seventeenth century , the language has evolved, giving rise to changes IN vocabulary, grammar and spelling. Many of the (3) ............ obvious differences are in the vocabulary used in the two countries. Many of the words that we use today DID not exist in the seventeenth century. "Pavements" in Britain, and "sidewalks" in the USA, only became common later, (4) ............ example. The two countries (5) ............ also borrowed words form different sources: courgettes (6) ............ imported to Britain from France and zucchini were brought to America BY Italian immigrants. Printing was a relatively new invention back then and the spelling (7) ............ most words had not yet been formalised, (8) ............ accounts for many of the differences in spelling.