Everyone asked me how the story ended, but it was __________________ (对我来说同样是个谜) as to them.

填空题By 2009, production in the area is expected __________________ (比2006年的产量翻一番).

单项选择题A．He got angry with his boss.B．He always got to work late.C．He was frequently sick and absent from work.D．He prepared a financial report incorrectly.