12 CÂU HỎI
People are curious to know what on Earth is viewable from space.
visible
bold
definite
certain
Research carried out in space covers various fields such as biology, physics, astrobiology, etc.
Procedure
Experiment
Assignment
Attempt
Even though scientists have spent years studying life on other planets, the existence of aliens maintain an unsolved mystery.
studying
life
of
maintain
Some people believe that solar and lunar eclipses occur when gods are anger and they bring disasters and misfortunes.
occur
gods
anger
misfortunes
In the past, farmers harvested crops and sailors navigated in the ocean using constellations.
crops
navigated
in
constellations
There is a myth which a full moon can influence animal behavior.
a
which
full
influence
Unidentified flying objects (UFOS) are often describe as disk-like spacecraft and surrounded by green light.
objects
describe
and
by
Thanks to Neil Armstrong's success, humans took a giant leap in space exploration.
If Neil Armstrong did not succeed, humans would not take a giant leap in space exploration.
If Neil Armstrong does not succeed, humans would not take a giant leap in space exploration.
If Neil Armstrong had not succeeded, humans would not have taken a giant leap in space exploration.
If Neil Armstrong had not succeeded, humans would take a giant leap in space exploration.
At NASA, trainees must pass intensive tests before they become astronauts.
At NASA, trainees must be tested intensively to become astronauts.
At NASA, trainees must test intensively to become astronauts.
At NASA, trainees must be tested intensively become astronauts.
At NASA, trainees must test intensively become astronauts.
Some people believe that aliens come from a more advanced civilization and they outsmart humans.
Aliens are believed come from a more advanced civilization and outsmart humans.
Aliens are believed coming from a more advanced civilization and outsmarting humans.
Aliens are believed to come from a more advanced civilization and to outsmart humans.
Aliens are believed to come from a more advanced civilization and outsmart humans.
It is not worthwhile to search for life on other planets.
It is no use to search for life on other planets.
It is no use searching for life on other planets.
It is not use searching for life on other planets.
It is not use to search for life on other planets.
It is reported that the moon would be totally eclipsed at 12.10 p.m.
The moon is reported to be totally eclipsed at 12.10 p.m.
The moon was reported that would be totally eclipsed at 12.10 p.m.
It is report that the moon won't be totally eclipsed at 12.10 p.m.
It is reported that the moon will be totally eclipsed at 12.10 p.m.