单选题 Standard English is the variety of English which is usually used in print and which is normally taught in schools and to non-native speakers learning the language. It is also the variety which is normally 21 by educated people and used in news broadcasts and other 22 situations. The difference between standard and non-standard, it should be noted, has 23 in principle to do with differences between formal and colloquial 24 ; standard English has colloquial as well as formal variants.
25 , the standard variety of English is based on the London 26 of English that developed after the Norman Conquest resulted in the removal of the Court from Winchester to London. This dialect became the one 27 by the educated, and it was developed and promoted 28 a model, or norm, for wider and wider segments of society. It was also the 29 that was carried overseas, but not one unaffected by such export. Today, 30 English is arranged to the extent that the grammar and vocabulary of English are 31 the same everywhere in the world where English is used; 32 among local standards is really quite minor, 33 the Singapore, South Africa, and Irish varieties are really very 34 different from one another so far as grammar and vocabulary are 35 . Indeed, Standard English is so powerful that it exerts a tremendous 36 on all local varieties, to the extent that many of long-established dialects of England have 37 much of their vigor and there is considerable pressure on them to be 38 . This latter situation is not unique 39 English: it is also true in other countries where processes of standardization are 40 . But it sometimes creates problems for speakers who try to strike some kind of compromise between local norms and national, even supranational (跨国的) ones.