It is no use _________ to persuade him ________ smoking because he has been addicted to it since he wasyoung.
-Jack, you seem in high spirits.-________ We won the match 4-0. (2011 .陕西)
Ellen was a painter of birds and of nature, ____, for some reason, had withdrawn from all human society. (2012 .浙江)
It is the third time that she has won the race, ____ has surprised us all. (2012 .陕西)
The air quality in the city,____ is shown in the report, has improved over the past two months. (2012 .福建)
Mary was much kinder to Jack than she was to the others, ____ , of course, made all the others upset.(2011.北京 )