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.)

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

A. observe                         B. explain                           C. calculate                        D. require

30.  Another word used to describe a UFO is _________.

A. spacecraft                     B. astronaut                       C. flying saucer                  D. cooking oil

31. Most of UFOs are identified as one of the following things EXCEPT _________.

A. stars                              B. balloons                         C. clouds                            D. rains

32. 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.

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.)

1.What does the word “figure 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......

A.stars    B.balloons    C.clouds    D.rains

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 reportes UFO sighting 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

Put the following words in the correct order.

41. UFO / flying / an / object / is / unidentified /.

………………………………………………………………………………………………………………………………

42. Earth / we / the / on which / is / live / planet /.

………………………………………………………………………………………………………………………………

43. The synonym / is / of falling / shooting star / meteor / star or /.

………………………………………………………………………………………………………………………………

44. He / healthy. He’s / excellent physical / feels very / condition / in /.

………………………………………………………………………………………………………………………………

45. The woman / in it / a UFO / said that / saw / aliens / she / and two /.

………………………………………………………………………………………………………………………………

TRUE(T) orFALSE(F)

An Unidentified Flying Object or a UFO is the name we give to something in the sky that we don't recognize. For thousands of years, there have been stories about strange subjects in the sky. Until recently,howerver, hardly anyone believed these stories. Soame of them sounded just too crayzy to be true. If you reorted seeing a"flying saucer" or something like that, most people thought you were imagining things.

 Recently, howerver, there have beeb many more reports of UFO sightings. Many if these objects have been seen by more than one person, so it is not easy to laugh at them. Occasionally, photographs have been taken which show that there was something there. But what was it? There is still such a lot we don't understand about the world we live in.

1.Stories about UFOs started a long time ago.

2.Until recently, most people have believed in the existence of UFOs.

3. Photographs may be not evidence for UFO appearance

4. Each UFO sighting has been seen by only one person 

Read the passage and choose the best answer.

A pilot cannot fly by sight alone. In many conditions, such as flying at night and landing in dense fog, a pilot must use radar, an alternative way of navigating. Since human eyes are not very good at determining speeds of approaching objects, radar can show a pilot how fast nearby planes are moving. The basic principle of radar is exemplified by what happens when one shouts in a cave. The echo of the sounds against the walls helps a person determine the size of the cave. With radar, however, the waves are radio waves instead of sound waves. Radio waves travel at the speed of light, about 300,000 kilometers in one second. A radar set sends out a short burst of radio waves. Then it receives the echoes produced when the waves bounce off objects. By determining the time it takes for the echoes to return to the radar set, a trained technician can determine the distance between the radar set and other objects. The word “radar”, in fact, gets its name from the term “radio detection and ranging”. “Ranging” is the term for detection of the distance between an object and the radar set. Besides being of critical importance to pilots, radar is essential for air traffic control, tracking ships at sea, and for tracking weather systems and storms. 

 According to the passage, the distance between a radar set and an object can be determined by _______.  

A. the time it takes for a burst of radio waves to produce echoes when the waves bounce off the object 

B. the term “ranging” used for detection of the distance between an object and the radar set 

C. the time it takes for the radio waves to produce echoes and bounce off the object 

D. the time it takes for the echoes produced by the radio waves to return to the radar set

Hoàn thành câu:

1. We apologize for the .................................... caused to the passengers. (convenient)

2. Using the Internet in daily life can be .......................... (cost)

3. Astronauts who are orbiting the Earth often experience sensation of ................................. (weight)

4. NASA scientists believe the ...................... (egist)

2. UFO, which means flying saucer, is the abbreviation for ................................... Flying Object (identify)

Question 4. Use the correct form of the words in brackets to complete sentences

1. To win the gold medal you will have to beat all the ……..        COMPETE

2. UFO means ……..Flying Object.                        IDENTIFY

3. I am  full of ……. for  her improvement.                    ADMIRE

4. It is becoming ………..difficult to find a job nowadays.            INCREASE

5. He is so …… . No wonder he has no friends.                AGREE

6. No one wore clothes like that any more they are terribly ….....     .    FASHION

7. Carol is a ……… girl and her ………. makes her popular.         THINK

8. The coal industry was ………private but was ………. in  the 1940s.    ORIGIN/NATION

9. I believe in ……….disease because ………. is better than cue.        PREVENT

10. The ……… which have just been built look very beautiful.        BUILD