1. The first roller skates
a. were faster than the ones used today.
b. were slow and clumsy.
c. were made of plastic.
2. The skates of 25 years ago
a. worked well on brick sidewalks.
b. cost more than today’s skates.
c. Sometimes came loose.
3. Roller skating
a. will be out of style in a few years.
b. will be illegal in a few years.
c. will never again be as popular as it is now.
4. In about 25 years
a. no one will roller skate.
b. there will be better and faster roller skates.
c. People will be roller skating on Mars.