问题描述：
选择最恰当的单词或词语完成短文。Is there life on other planets? We do not know for sure. In 1977, the American spaceship Voyager 1 and Voyager 2 were sent into space. The spaceship carried messages of greeting for any intelligent(智能的) life forms. There was a 1 question to answer before the messages were sent. How could you “talk” to an alien on another planet? How could alient understand human life on Earth? 2 , how should the message be presented(呈现)?
Many people were surprised when scientists decided to send music 3 words or pictures. The scientists decided it was easiest to communicate through music. As a result, a message disc with nearly 88 minutes of music was sent.
4 was music chosen? Music is an easily understood art form. All people, young or old, can enjoy it. When people hear a piece of music, they usually link it with a 5 . A piece of music can make you feel sad, angry, calm or joyful. Every culture, from the past to the present, has 6 its own music to express its sadness, pain and happiness.
Different pieces of music were chosen for variety. Traditional songs and music from many countries were selected for the disc. Modern rock “n” roll and Western classical music were also included. Perhaps one day we will receive a similar disc from 7 planet!
最佳答案： 【分析】1. 根据下文提出的一系列困难可知，这是一个难以回答的问题。选difficult“困难的”。
2. in other words 换句话说；in fact 事实上；after all 毕竟；by the way 顺便说。句意为：换句话说，消息怎样才能呈现出来呢？
3. 当科学家们决定发送音乐而不是文字和图片时，许多人很惊讶。instead of 代替，而不是。
4. 后句Music is an easily understood art form.与前句是因果关系。故选why“为什么”。
5. 根据下文提到的...feel sad, angry, calm or joyful可知，音乐是与情绪相连的。故选feeling“感情，情绪”。
6. 从古至今，每一种文化都创作了独特的音乐来表达它的悲伤、痛苦和幸福。create“创造，创作”，由has可知，用现在完成时，故选created。
7. another (三者或三者以上中的)另外一个，后接可数名词的单数形式。或许有一天我们可以收到来自另外一个星球的相似的唱片。
