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It is the firm belief of astronomers that there are living creatures on othe
It is the firm belief of astronomers that there are living creatures on othe
游客
2025-03-18
17
管理
问题
It is the firm belief of astronomers that there are living creatures on other planets. It is also their earnest wish that some day contact may be made【C1】______such living creatures by sending messages with the help of radio signals. The【C2】______of communicating with people on other planets may one day come true since radio telescopes have now been invented.
Scientific projects of various kinds are now being launched to【C3】______signals or to receive signals from distant planets. The question now【C4】______. What sort of message should be sent so that it could be understood. To send a message in any language would be impractical as it would【C5】______not be intelligible.【C6】______is the opinion of scientists that a signal in the form of a simple arithmetic sequence might be understood.
Scientists think that pictures might also be understood, so it would be a good idea to send pictures of the people【C7】______our planet. Pictures of domestic animals together with various crops we【C8】______for our food might also be sent. Pictures of houses and buildings might【C9】______further information about our life and society.
As time goes on, TV pictures might be sent which would make the beings on other planets aware【C10】______the life and the level of civilization on our planet. [br] 【C6】
选项
A、It
B、What
C、That
D、There
答案
A
解析
从句子结构分析,that引导的是主语从句,因此句首要求一个形式主语It,A项符合此要求,其他词都不能作形式主语。
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