Throughout the year over two million people are expected to directly ___ Japan 2005,a series of festivals and performances taking place around the country.

    A. visit            B. participate in       C. involve       D. come to

Throughout the year over two million people are expected to directly ___ Japan 2005,a series of festivals and performances taking place around the country.

1. A.
   visit
2. B.
   participate in
3. C.
   involve
4. D.
   come to

Throughout the year over two million people are expected to directly _____ Japan 2005, a series of festivals and performances taking place around the country.

A. visit       B. involve       C. come to       D. participate in   

Throughout the year over two million people are expected to directly ___ Japan 2005,a series of festivals and performances taking place around the country.

    Throughout the past few centuries there have been recorded reports of space vehicles which have visited our Earth from another planet.  In more recent years, these reports of Unidentified Flying Objects(UFOs) have attracted a great deal of public interest.

    The reports of UFOs seem to increase over periods of a year or two, and then die down again. Many of the people who claim to have seen them are skilled observers of air, such as airline pilots.

    The number of reports runs into thousands, and they come from many parts of the world. There are also a number of supposedly authentic(可信的) photographs of these spacecraft which have earned them elves the nickname of "flying saucers"(飞碟) because of their fault, dish-like shape.

    So persistent have been these "sightings" that during the 1960s, the USA set up the National Investigation Committee on Aerial Phenomena (国家天象调查委员会) to investigate them. Nearly 11000 reports were analyzed (分析) and after eliminating (排除) sightings which could be explained away as normal phenomena, such as meteorites（损星）, high altitude(高空) weather balloons, and even satellites re-entering the atmosphere, they came to the conclusion that UFOs were genuine. They could not, however, explain what they were or from where they came.

    The United States Air Force, on the other hand, also carried out an evaluation(估计) of UFO sightings, and concluded that all but a very few of the thousands of sightings could be logically (合乎逻辑的)explained away, or traced to (追索为) some natural source, and the few unexplained ones were only unexplained because the evidence was insufficient(不足以) to draw any definite conclusion.

    Well, are UFOs spaceships from a distance planet, and are they under the control of extra-terrestrial things who are keeping close watch over our Earth? It can only be said that the case for UFOs remains as yet unproved. One thing is certain, man is as curious and determined to find the answer to the problem of UFOs as he is to unravel all the other unsolved mysteries of our Universe.

1．Why have people become more and interested in UFOs?

A．Because many of the people who claim(声称) to have seen them are skilled observers of the air.

B．Because there are some supposedly authentic photographs of UFOs.

C．Because there are continuing reports of UFOs.

D．All of the above.

2．According to the investigation by the U.S., UFOs________.

A．can not be explained away

B．really exist

C．can be explained away as normal phenomena

D．are from an unknown planet

3．Among the thousands of UFO sightings, the United States Air Force can logically explain away________.

A．a very few of them

B．all of them

C．almost all of them

D．many of them

4．The phrase “extra-terrestrial beings” means________.

A．spacemen

B．human beings

C．astronauts

D．airline pilots