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Coal is a(n) ___________ energy source.
expensive
non-renewable
renewable
Cyclists need to obey the traffic___________ by not carrying more than one passenger.
rules
jams
lights
A teleporter is ___________ , so it doesn’t cause pollution.
available
eco-friendly
fast
A solowheel runs___________ electricity, so it is safe for the environment..
in
on
by
____________ turbines transform the kinetic energy of air currents into electrical energy.
wind
hydro
solar
They expect zero-emission fuel cell buses to become a ____________ of transport.
means
instrument
measure
They expect zero-emission fuel cell buses to become a ____________ of transport.
a
an
the
Jim wanted to ____________ the boat alone, but his parents didn’t agree.
fly
sail
travel
ride
______ 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.
pedal
battery
wing
I’m afraid John ________ us tomorrow because he’s sick.
doesn't join
didn't join
won't join
.__________is it from your house to the nearest bus stop? – “About 50 meters.”
How long
How often
How far
Peter goes to school __________ foot everyday.
at
on
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.
violent
funny
interesting
