Поставьте в правильной форме глаголы...Badminton is a traditional game for picnics. Its aim ____(to be) to keep the shuttlecock

Badminton is a traditional game for picnics. Its aim is to keep the shuttlecock in the air as long as possible. It is also one the favourite children\'s games. Badminton is a wonderful game full of movement. It is the fastest of racket sport: a schuttlecock reaches speeds of 327 km per second!