1 The best thing about school is opportunity to communicate with classmates, make friends and get knowledge. The worst thing is wasting my time on learning things that I will forget soon and never ever use in my life.
2 During my holidays I miss my teachers (well, some of them, but not all) and friends. Surely I can hang out with my friends or chat with them on social networks, but I miss the atmosphere of our classes.
3 If I could change my school, I would let all the schoolchildren use wi-fi and have computers installed in every classroom. I would buy all the necessary teaching aids and devices for every subject taught at our school so that our classes were more memorable and fun. And I would like to limit the number of pupils in one class. It is just too noisy when there are more than 20 pupils in class.
b)would have noticed
с)would you feel; had offered(?)
d)lent; would pay(?)
e)catches; he throws