Some scientists believe that there is no _______ that the new medicine for cancer will be found. (　　)

How do you think about his mistakes in the letter— . After all, he is only a beginner.

31 It is in the year of 2010 a severe drought hits Yunnan province

So far _____ people have visited the old city in Zhejiang.

Sarah decides to move to Hainan because shethinks that the air there is much fresher than ___ here.