Passage One
Some radio singals were heard in 1967.They were coming from a point in the sky where there was unknown star.They were coming very regularly too, about once a second, if they were controlled by clock.
The scientists who heard the signals did not tell anybody else.They were rather afraid to tell in case they frightened people.The signals were coming from a very small body—no bigger,perhaps than the earth.Was that why no light could be seen from it?Or were the signals coming from a planet that belonged to some other star? There was no end to the questions,but the scientists kept the news secret.“Perhaps there are intelligent beings out there.”they thought,“who are trying to send messages to other planets,or to us?So the news was not given to the newspaper.Instead,the scientists studied the signals and searched for others like them...Well,all that happened in 1967 and 1968.Since then scientists have learnt more about those strange,regular,radio signals.And they have told the story,of course.
The signals do not come from a planet;they come from a new kind of star called a “pulsar”.About a hundred other pulsars have now been found,and most of them are very like the first one.
Pulsars are strong radio stars.They are the smallest but the heaviest stars we know at present.A handful of pulsar would weigh a few thousand tons.Their light—if they give much light—is too small for us to see.But we can be sure of this,no intelligent beings are living on them.
The radio signals discussed in this passage________.
见原文第一段，“They were coming very regularly,too.”他们同样非常有规律，与 A)项同意。B)were controlled by a clock.由时钟控制，原文前面有一表示“似乎的”连词 if。C)，D)根据下文判断都不正确。
【参考译文】 文中讨论到的电磁信号……
【短文大意】
1967年人类收到了一些太空信号。这些信号来自太空中的某一恒星领域，它们极有规律，难道这是外星人向地球或我们发收的信号?为了不致在人们 当中造成恐慌，科学家们一直保守着这个秘密，并且一直对它们进行研究。如今，当然一切都真相大白。原来这些信号都来自一种叫脉冲星的恒星，它们的密度极大连光线也难以逃逸。但有一点可以确定，上面没有智能生命存在。
The radio singals were sent by ________.
见原文第三段“...they come from a new kind of star called a ‘pulsar’”他们来自一种叫脉冲星的新型恒星。 A) a satellite卫星，B)a planet行星，D)当时未知的智能生命。
【参考译文】 这些电磁信号来自于……
The scientists did not tell people about the signals because ________.
见原文第二段开头“ The scientists who heard the singals did not tell anybody else.They were rather afraid to tell in case they frightened people.”听到该信号的科学家未告诉别人，他们害怕这样会惊吓了老百姓。因此选择 C。
【参考译文】 科学家们没有把有关电磁信号的事情告诉人们是因为……
A pulsar is ________.
见原文第四段，实际由“star”这个单词就可排除B)，C)和D)选项。
【参考译文】 脉冲星是……
Which of the following is true?
见原文第三段最后一句“About a hundred other pulsars have now been found...”因此D)项正确，其他各项均与原文意思不符。
【参考译文】 以下说法，哪一个是正确的?