Решение:
Чтобы правильно поставить глаголы в нужный tense, нужно внимательно прочитать предложение и понять, какое время подходит по смыслу.
- Sarah is a bored teenager. If she joins (join) a club, she will make (make) more friends.
- She will enjoy (enjoy) herself if she goes (go) out more.
- Her schoolwork is suffering too. If she studies (study) more, she will have (have) better marks and she will enter (enter) university.
- Unfortunately, she is becoming overweight. She will feel (feel) fitter if she starts (start) swimming, and she will get (get) thinner if she stops (stop) eating so much chocolate.
Ответ: joins, will make; will enjoy, goes; studies, will have, will enter; will feel, starts, will get, stops.