Read the passage and choose the correct answer to complete the sentence:
A UFO (Unidentified Flying Object) is an object flying in the sky which cannot be identified by the person who sees it. Sometimes the object is investigated. If people can still not figure out what the object is after an investigation, it is called a UFO. If they figure out what the object is, it can no longer be called a UFO because it has been identified.
Even though UFOs can be anything, people often use the word UFO when they are talking about alien spacecraft. Flying saucer is another word that is often used to describe an unidentified flying object.
Studies estimate that 50 % -90 % of all reported UFO sightings are identified later . Usually 10 % -20 % are never identified . Studies also show that very few UFO sightings are hoaxes (people trying to trick other people). Most UFOs are actually natural or man - made objects that looked strange . % -90 % UFOs are identified as one of three different things: astronomical causes (for example: planets , stars , or meteors ) ; aircraft , balloons 10 % -20 % of UFOs are other causes (such as birds, clouds, mirages, searchlights, etc.)
1. What does the word "igure out" in paragraph 1 mean?
A. observe B. explain C. calculate D. require
2. Another word used to describe a UFO is ………………….
A. spacecraft B. astronaut C. flying saucer D. cooking oil
3. How many percents of all reported UFO sightings are not identified?
A. 10 % -20 % B. 20 % -30 % C. 30 % -50 % D. 80 % -90 %
4. Most of UFOs are identified as one of the following things except .
B. balloons C. clouds D. rains A. stars
5. Which of the following sentences is NOT true?
A. UFO means Unidentified Flying Object.
B. UFO is often used to talk about alien spaceships.
C. Many UFO sightings are hoaxes.
D. Over half of all reported UFO sightings are identified

Read the passage below and choose one correct answer for each question.

A UFO (Unidentified Flying Object) is any object flying in the sky which cannot be identified by the person who sees it. Sometimes the object is investigated. If people can still not figure out what the object is after an investigation, it is called a UFO. If they figure out what the object is, it can no longer be called a UFO because it has been identified.

Even though UFOs can be anything, people often use the word UFO when they are talking about alien spacecraft. Flying saucer is another word that is often used to describe an unidentified flying object.

Studies estimate that 50%-90% of all reported UFO sightings are identified later. Usually 10%-20% are never identified. Studies also show that very few UFO sightings are hoaxes (people trying to trick other people). Most UFOs are actually natural or man-made objects that looked strange. 80%-90% UFOs are identified as one of three different things: astronomical causes (for example: planets, stars, or meteors); aircraft; balloons 10%-20% of UFOs are other causes (such as birds, clouds, mirages, searchlights, etc.)

What does the word “figure out” in paragraph 1 mean?

A. observe

B. explain

C. calculate

D. require

Read the passage, and choose the correct answer A, B, C or D for each question.

All of the following are mentioned as features of the Hue Citadel EXCEPT …..

A. the Temple of Literature

B. the royal tombs

C. the period from 1802 to 1945

D. the damage during the war

Read the passage, and choose the correct answer A, B, C or D for each question.

All of the following are attractions of Lang Co Beach EXCEPT ……….

A. the National Highway 1A next to it

B. smooth white sand, and full of sunshine

C. cool, blue and clear sea as crystal

D. its location on the "Central Heritage Road"

Read the passage, and choose the correct answer A, B, C or D for each question.

All of the following are the wonderful features of Son Doong Cave EXCEPT ………

A. tropical jungle inside with the biodiversity

B.spectacular scenery of numerous stalactites and stalagmites

C.a river flowing over 2.5 kilometers along the cave

D.the big sizes of the cave and the giant domes

Read the passage, and choose the correct answer A, B, Cor D for each question.

All of the following are true EXCEPT that

A. brocade weaving has become the most important craft in Sa Pa and nearby districts

B. local people can sell brocade handicrafts, products to tourists

C. other districts should start preserving their crafts like Sa Pa

D. preservation of traditional crafts can be associated with tourism

Read the passage, and choose the correct answer A, B, C or D for each question.

At high school, you can do all of the following things to prepare for your future career EXCEPT ………….

A. choosing the proper high school

B. enrolling in the necessary courses

C. earning good grades

D. learning by experience

Read the passage below and choose one correct answer for each question.

Which of the following sentences is NOT true?

A. UFO means Unidentified Flying Object.

B. UFO is often used to talk about alien spaceships.

C. Many UFO sightings are hoaxes.

D. Over half of all reported UFO sightings are identified.