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銆€銆€Test 1

銆€銆€A scientist once said: 鈥淚 have concluded that the earth is being visited by intelligently controlled vehicles from outer space.鈥?/p>

銆€銆€If we take this as a reasonable explanation for UFOs (unidentified flying objects), questions immediately come up.

銆€銆€鈥淲hy don鈥檛 they get in touch with us, then? Why don鈥檛 they land right on the White House lawn and declare themselves?鈥?people asked.

銆€銆€In reply, scientists say that, while this may be what we want, it may not necessarily be what they want.

銆€銆€鈥淭he most likely explanation, it seems to me,鈥?said Dr. Mead, 鈥渋s that they are simply watching what we are up to -- that responsible society outside our solar system is keeping an eye on us to see that we don鈥檛 set in motion a chain reaction that might have unexpected effects for outside our solar system.鈥?/p>

銆€銆€Opinions from other scientists might go like this: 鈥淲hy should they want to get in touch with us? We may feel we鈥檙e more important than we really are! They may want to observe us only and not interfere with the development of our civilization. They may not care if we see them but they also may not care to say 鈥榟ello鈥?鈥?/p>

銆€銆€Some scientists have also suggested that Earth is a kind of zoo or wildlife reserve. Just as we set aside wilderness areas and wildlife reserves to allow animals and growing things to develop naturally while we observe them, so perhaps Earth was set aside ages ago for the same purpose.

銆€銆€Are we being observed by intelligent beings from other civilizations in the universe? Are they watching our progress in space travel? Do we live in a gigantic 鈥渮oo鈥?observed by our 鈥渒eepers,鈥?but having no communication with them?

銆€銆€Never before in our history have we had to confront ideas like these. The simple fact is that we, who have always regarded ourselves as supreme in the universe, may not be so. Now we have to recognize that, among the stars in the heavens, there may very well be worlds inhabited by beings who are to us as we are to ants.

銆€銆€16. People who ask the question 鈥淲hy don鈥檛 they get in touch with us... and declare themselves?鈥?think that ________.

銆€銆€[A] there are no such things as UFOs

銆€銆€[B] UFOs are visitors from solar system

銆€銆€[C] there鈥檚 no reason for UFOs sooner or later(A)

銆€銆€[D] we are bound to see UFOs sooner or later

銆€銆€17. According to Dr. Mead, the attitude of beings from outer space toward us is one of ________.

銆€銆€[A] unfriendliness

銆€銆€[B] suspicion

銆€銆€[C] superiority(B)

銆€銆€[D] hostility

銆€銆€18. The tone of the writer is that of ________.

銆€銆€[A] doubt

銆€銆€[B] warning

銆€銆€[C] indifference(D)

銆€銆€[D] criticism

銆€銆€絳旀錛?6. [A]17. [B]18. [D]