B．Its ocean adds to people's excitement about life beyond Earth.

C．It will be used by NASA as a base for the Hubble telescope.

D．Its liquid ocean was first proved by the Galileo spacecraft.

【答案】　B　细节理解题。根据通过第五段中"A deep ocean under the icy surface of Ganymede opens up further exciting possibilities for life beyond Earth."可知海洋增加了人们关于地球以外的生命的兴奋。故选B。

2．Which of the following best describes the writer's attitude towards Hubble?

A．Cautious.　　　　　 B．Doubtful.

C．Negative. D．Favourable.

【答案】　D　推理判断题。Cautious谨慎的；Doubtful怀疑的；Negative否定的；Favourable支持的。根据通过第五段中"This discovery marks an important milestone，highlighting what only Hubble can accomplished."可知作者对Hubble的态度是支持的。故选D。

3．What does the underlined part in Paragraph 6 mean?

A．An underground ocean has been found in Europe.

B．The presence of an underground ocean in Europe is not possible.

C．It is now certain that there is an ocean on Europe.

D．No evidence has shown the existence of an ocean on Europe.

【答案】　C　句意猜测题。通过横线句子中的"confirmed the existence"和"NASA has announced plans to send an unmanned mission there searching for the life that might come with liquid water."可知欧洲上空可能有海洋是确定的。故选C。

4．What type of writing does this passage belong to?

A．A term essay. B．A news report.

C．An experiment report. D．An exploration review.

【答案】　B　推理判断题。A term essay一个学期论文；A news report一个新闻报道；An experiment report一个实验报告；An exploration review一个探索