This rocket uses fuel __________ than the previous model.
the most efficient
more efficient
efficientlier
more efficiently
Of all the satellites, Nova-3 communicates with Earth __________.
more reliably
the most reliable
reliablest
the most reliably
Our science group worked __________ than the other groups on the space project.
most carefully
carefuller
more careful
more carefully
Of the three astronauts, Leo completed the experiment __________.
more quickly
quicklier
the quickest
the most quickly
The Moon robot did not perform __________ the Mars robot.
as good as
as better as
the best
as well as
The newest telescope can observe distant planets __________ than the old telescope.
better
more well
gooder
best
The second space probe sent its messages __________ than the first probe.
more regular
most regularly
more regularly
regularlier
Nina answered the astronaut’s questions __________ than her classmates.
more confident
more confidently
confidentlier
most confidently
The student-built rover moved __________ of all the machines.
more slowly
slower
the slowest
the most slow
Our school telescope does not focus __________ as the observatory’s telescope.
most accurately
more accurately
as accurately
accurate
The new Mars rover moves __________ than the older model.
most efficiently
efficientlier
more efficiently
more efficient
Our model rocket rose __________ than we expected during the school experiment.
faster
the fastest
more faster
more fast
This new computer analyzes information __________ than our classroom tablet.
more efficiently
more efficient
efficiently than
most efficiently
The astronauts walked __________ on the Moon than they do on Earth.
more slowly
most slowly
slower
more slow
The old rover did not climb the rocky hill __________ as the new one.
easy
more easily
the easiest
as easily
Of all the robots in the competition, Luna collected the samples __________.
the most carefully
the most careful
more carefully
carefulliest
Maya explained the solar system __________ than I did.
most clearly
clearer
more clearly
more clear
The first rocket landed __________ than the second rocket.
least safely
more unsafe
less safe
less safely
Of all the teams, our group described the alien planet __________.
the most creative
the most creatively
creativeliest
more creatively
The smaller satellite travels __________ than the large space station.
more faster
faster
more fast
fastest