I pay the bill by check— Sorry, sir According to the rules of our hotel, thepayment ______ be made in cash

_______ difficult and challenging the task may be, we must finish it on time, because there is a possibility _______our work will go down in history.

I soon found that the work I was doing had already been done by somebodyelse, , I was wasting my time

填入下面文段空白处的词语，最恰当的一组是（ ）一般人写文章，着重文字的推敲。① ，② 很重要，但作者的思想、情感和德性 ③ 重要，④ 有优美修辞的作品，永远不能列为第一流。由思想、情感和德性构成的作者的独特风格，⑤ 成为这个作者作品的骨骼。 ⑥没有骨骼的作品，是言之无物的，是不值得一读的。

“We can not afford limited progress We need rapid progress,” Ban said at the Third World Climate Conference in Geneva, ______by the World Meteorological Organization (WMO) [ ]