【单选题】Nelson Mandela was still in jail when the first street was named【67】him. By the time he retired as President of South Africa, hundreds of streets, squares and schools【68】his name, as did many more pop...
【单选题】Cotton, like silk, was discovered and made【61】cloth by man before the historical period【62】. Its first recorded use was in India【63】cotton cloth of very fine texture, almost【64】 silk, was made. When t...