Viết lại câu sau sao cho nghĩa không thay đổi

Viết lại câu sau sao cho nghĩa không thay đổi
1: My current house is more spacious than the old one
         My old house......
2: He performed better tha he was expected 
         He was expected.........
3: This time Mike run faster than his brother
         This time Mike's brother
4: I think you will have a higher position in our company than Jim
         I think Jim will..........
5: Jane decorated her cake more beautifully than I did
        I.............
6: This year Peter invested a larger amount of money on his business than that year
        Last year.............
7: My computer is costlier than Jim's
         Jim's computer......... 
8: Playing sports is more time saving than playing computer games
       Playing computer games.......