1...you study subjects and spend a lot of time.
2...hard work.
3...I would never say it.
4...could drive a car.
5...it would become a success.
6...I had longer holidays.
7...I was born in Russia.
8...Earth goes around the Sun.
9...it is true.
10...always compete with each other.
11...when you expect or want them to happen.
12...become a lawyer.
13...multylingual.
14...№12 и №14 одинаковые
15...help their children financially.