21. It is convenient, cheaper(cheap), and we can save time and sell our sales on line.

20. Our products or un-wanted things.

19. Big stories.　

18. Because we can choose the products from a large range and get to know the mew products.

0.5　　　 0.5　　　 0.5　　　 0.5

16. It took me half a day to help my brother repair / mend

0.5　 0.5　　 1　　　 1　　　 0.5　 0.5

15. Why 　not 　go / Why don’t　 you　 go

0.5　　 0.5　　　　 0.5　 0.5　 0.5　　 0.5　　　 0.5　　 0.5

14. too 　expensive 　for me 　to /　 　so 　expensive 　that 　I can’t