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Coal is a(n) ___________ energy source.
non-renewable
renewable
expensive
Cyclists need to obey the traffic___________ by not carrying more than one passenger.
jams
lights
rules
A teleporter is ___________ , so it doesn’t cause pollution.
available
fast
eco-friendly
A solowheel runs___________ electricity, so it is safe for the environment..
by
in
on
____________ turbines transform the kinetic energy of air currents into electrical energy.
solar
hydro
wind
They expect zero-emission fuel cell buses to become a ____________ of transport.
measure
instrument
means
They expect zero-emission fuel cell buses to become a ____________ of transport.
the
a
an
Jim wanted to ____________ the boat alone, but his parents didn’t agree.
fly
sail
ride
travel
______ the children ______ trash in the school yard now?
Are/collecting
Did/collect
Will/collect
____________ is a self-balancing one-wheeled electric vehicle for personal transportation.
bamboo-copter
Solowheel
bullet train
When your electric car ____________ depletes, it will need to be recharged.
wing
battery
pedal
I’m afraid John ________ us tomorrow because he’s sick.
won't join
doesn't join
didn't join
.__________is it from your house to the nearest bus stop? – “About 50 meters.”
How often
How far
How long
Peter goes to school __________ foot everyday.
on
at
by
We couldn’t stop laughing when seeing this __________.
action films
fantasy
comedy
The film is too __________ with a lot of fighting and killing scene.
interesting
funny
violent
