20 CÂU HỎI
What does the passage mainly discuss?
A. Days on Mercury
B. What Mercury is like
C. Sunrise on Mercury
D. Length of a year on Mercury
According to the passage, Mercury _____________.
A. is the nearest to the Sun
B. doesn't have atmosphere
C. the hottest planet
D. has many moons
The word "It" in paragraph 2 refers to _____________.
A. Earth
B. Mercury
C. Venus
D. Mars
The word "spins" in paragraph 3 can be best replaced by _____________.
A. comes
B. arrives
C. appears
D. moves
It can be inferred from the passage that a year on Mercury _____________.
A. has 59 days
B. much longer than that on Earth
C. has 88 days
D. has only 180 days
How often does the sun rise on Mercury?
A. The same as on Earth.
B. Every 3 months.
C. Every 180 days.
D. Sun never sets.
All of the UFO sightings were later identified as ordinary objects like planes, satellites, etc.
A. True
B. False
People also call UFOs of any shape flying saucers.
A. True
B. False
The Air Force took the reports of UFO sightings seriously because they believed in visitors from outer space.
A. True
B. False
Project Blue Book was one of the Air Force's programs.
A. True
B. False
The Air Force concluded that UFOs were not a threat to the US.
A. True
B. False
UFOs are always proven to be alien spaceships.
A. True
B. False
Modern UFO sightings started in the mid-20th century.
A. True
B. False
Flying saucers only refer to round-shaped UFOs.
A. True
B. False
The Air Force created Project Blue Book to study UFOs.
A. True
B. False
Scientists haven't done much research to find life forms on other planets.
A. True
B. False
Earth's temperate atmosphere makes it accommodative to life forms.
A. True
B. False
Earth's distance from the Sun allows it to receive just enough heat.
A. True
B. False
No other planets have any of Earth's life-sustaining features.
A. True
B. False
Earth is still the only planet with all necessary conditions for life.
A. True
B. False