Exercise 2. fill in the gaps with the prepositions through, for, by, across, to, in, of, in, by, for, from, in, across. 1. swimmers move water using the arms and legs. 2. people very young the elderly swim fun. 3. people swim lakes, oceans, and rivers. 4. thousands swimmers compete swimming galas held schools, colleges and swimming clubs. 5. many long-distance swimmers attempt such feats as swimming the english channel or the cook strait. 6. there is an emergency the water. 7. swimming is one of the best exercises physically fit.