Complete the sentences with suitable prepositions.

Write one word in each gap.

If I were Jim, I'd try following [ ] diet.

I don't really want to go [ ] a diet. I'm fine with my body.

Did you know that celery is very low [ ] calories?

I started working out a month ago, and I'm planning to keep it [ ].

I'd never be able to keep [ ] a diet. I love junk food too much!