15. We will use more
A. solar
16. A jet pack doesn't
A. have
17. Which
A. mean
energy in the future.
D. sunlight
B. sunny
C. sun
a lot of space.
D. occur
B. bring
C. take
of transport do you think will be used in the future?
B. meaning
C. meanings
18. We are looking for types of vehicles that help us to avoid
.
D. means
A. traffic
B. traffic jams
19. The Segway, which is a
C. rush hours
vehicle, will be a success.
D. walking
A. two-wheels
B. two wheels
C. two wheel
D. two-wheel
20. With the Segway, the driver pulls the handle to go back or pushes it to go
A. forward
B. backward
C. round
D. fly.