I.
1.doing ---> to do (vì cấu trúc " it take + to V")
2. Fewer ---> less ( vì " work" ko đếm đc)
3. Going ---> to go ( vì sau " would like + to V")
4. Travel ---> traveling ( vì cấu trúc " get used to + Ving")
5. To play ---> playing ( vì " spend time + Ving")
II.
1. Listening to music is more interesting than playing game.
2. Life nowadays is more comportable than life in the past.