1) The Olympic Games are the largest international complex sports competitions that are held every four years under the auspices of the International Olympic Committee.
2) Once every four years.
3) Faster, higher, stronger.
4) Blue (cyan), black, red (first row) and yellow and green (second row)
5) The Olympic mascot is part of the Olympic symbolism, since 1968 a mandatory attribute of the Olympic Games.
6) The first summer Olympic Games of our time. Held from 6 to 15 April in Athens, Greece.
7) They settled in the town of Samani at the foot of Mont Blanc in the French Alps, i.e. in France in 1924.
8) Тут пишется, какой вид спорта в олимпийских играх тебе нравится?
(Я не знаю, какой нравится тебе, так что в 8ом переведи сам)