I have met the boy helping you with the work yesterday --> The boy

1 I have met the boy helping you with the work yesterday -->The boy
2 The sales of mobile phone have increased considerably since 2005 -->there has
3 the match was postponed to the following Sunday because the weather -->Owning to
4 Parents are often proud of their children's good result(pride) -->
5 Brussels us a good place to spend a weekend.I've visited it serveral time already -->Brussels
6 Only when something major and comprehensive is done can we prevent war , disease and poverty -->In order
7 Secondary school is free in Britain -->You don't have to
8 Mr.Taylor fixed the sewing machine for my mother --> My mother got
9 As the class representative,I would like to welcome you -->On
10 We were told to wait here by the director -->It was
11 Speaking during the exam is forbidden -->You
12 He is studying English very hard .He want to study at Harvard university -->With a view............
13 She can sing and play the piano well -->Not only.....................