R.Jordania 

Roller skating used to be strictly for children. Nowadays, with the new neoprene wheels and frictionless ballbearings, rollerskating has become popular with people with of all ages and all social classes.

Not only do people skate, they also dance on roller skates – ______ the term roller-disco.

To cater to the new fad, many indoor roller – disco rinks are opening all over the country. There people can dance on roller skates ______ in winter when there is snow and ice on the ground.

Life in the USA.

Complete the text with the correct alternative subsequently.