Ответ:
1)I prefer swimming in the pool, because in pool water is always clean and the water is not salty like in the sea.
2)I prefer watching films in my language, because i can easy understand what actors are saying.
3)I prefer communicating by text messenges, because it's faster to get an answer or ask something or just chat with your friends
4)I prefer doing English homework, because i can improve my knowledge of English by doing exercises.
5)I prefer eating at home, because it's fast and you don't need to waist to much money on your meals.
6)I prefer going on holiday abroad, because it's always interesting to see other countries and how people live there