2. 外语
  3. The reason for their unusual behavior remains a puzzle.

The reason for their unusual behavior remains a puzzle.

admin2009-05-21  92
问题 The reason for their unusual behavior remains a puzzle.
选项 A、fact
B、mystery
C、statement
D、game
答案B
解析 puzzle这个名词的意思是“令人困惑的事情或问题、不解之谜”。四个选项中只有 mystery和它同义。又如：It is still a puzzle/mystery how the ancient Egyptians built the pyramids．(古埃及人究竟怎样建造金字塔至今还是个没有解开的谜)。
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