答案　D

解析　细节理解题。根据最后一段中的"showing the heroic life and death of a magic American Indian"可知The song of Hiawatha叙述了美洲印第安人的故事，故选D。

2．Which of the following statements is TRUE according to the passage?

A．Of the five works，four are poems.

B．Walt Whiteman was an enthusiastic poet and singer.

C．The Education of Henry Adams is a non­fiction book.

D．Of the five books，Moby Dick was published last.

答案　C

解析　细节理解题。根据第三段中的"the book provides insight into Adams' family，including his experience..."可知，它不是小说而是自传，故选C。

　　Our days on Earth are numbered，according to Professor Stephen Hawking.

　　The world­famous physicist has previously issued warnings to the world that robots could wipe out mankind and that leaving Earth is our only hope.

　　"I believe that life on Earth is at an ever­increasing risk of being wiped out by a disaster，such as a sudden nuclear war，a genetically engineered virus，or catastrophic global warming，"he said."I think the human race has no future if it doesn't go to space."

　　Hawking said that increasingly，most of the threats mankind faces come from progress in technology."We are not going to stop making progress，or reverse it，so we must recognize the dangers and control them."

　　To get away from these threats，humankind will have to colonize other planets，which Hawking believes will take more than a century."We will not establish self­sustaining colonies in space for at least the next hundred years，so we have to be very careful in this period，"Hawking said.

　　Research regarding sending humans into space remains strong.

　　In September the US Senate introduced a bill that authorizes a new19.5 billion (￡15billion) budget for NASA to send a crew to the red planet，but commanded it must happen within the next 25 years.

　　Professor Hawking has also previously singled out the risk of artificial intelligence (AI) becoming powerful enough to cause the downfall of mankind.

In July，Professor Hawking and Tesla founder Elon Muskled 1,000 robotics experts in an open letter warning that"weapons entirely powered by AI will become the Kalashnikovs of tomorrow"．