2. 外语
  3. It is the firm belief of astronomers【C1】______there are living creatures on other planets. It is also their ear- nest wish that

It is the firm belief of astronomers【C1】______there are living creatures on other planets. It is also their ear- nest wish that

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问题     It is the firm belief of astronomers【C1】______there are living creatures on other planets. It is also their ear- nest wish that some day【C2】______may be made with such living creatures【C3】______sending messages in the form of radio signals. The【C4】______of communicating with people on other planets may one day come【C5】______since radio telescopes【C6】______.
    Scientific project of various kinds are now being launched to【C7】______signals or to receive signals from distant planets.      The question now【C8】______: What sort of message【C9】______so that it could be understood? To send a message in any language would be impractical【C10】______it would【C11】______not be intelligible.
It is the opinion of scientists that a signal in the【C12】______of a simple arithmetic sequence might be understood.
    Scientists think that pictures might also be understood, so it【C13】______a good idea to send pictures of the people【C14】______our planet. Pictures of domestic animals together with【C15】______crops we【C16】______for our food might also be【C17】______. Pictures of houses and buildings might【C18】______further information about our life and society.
    As time goes on, TV pictures might be sent, which would【C19】______acquaint the beings on other planets【C20】______life and the level of civilization on our planet.
【C19】
选项 A、therefore
B、furthermore
C、further
D、nevertheless
答案C
解析 此题为考查副词用法的语法类题目。要选择正确答案，首先要进行语法分析。最后这段话中，which 引导了一个非限定性定语从句，指代前面这一句话。也就是说：随着时间的推移，我们也可能发送电视图像，这就可以使其他星球的生物能更好地了解我们星球的生活和文明程度。所以可以判断出，这里需要选择一个表示递进关系的副词。A) therefore 表因果关系； B) furthermore 也是表示递进关系的副词，然而它不可以直接跟后面的词，必须有逗号相隔。例如：“The house is too small，and furthermore，it’s too far from the office．(这座房子太小，而且离办公地点也太远。)”C) further 为表示“更进一步地”这一意思的副词，为正确答案。D) nevertheless 表转折关系。
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