_____ is known to us all is that to work hard to achieve a goal is more important than only to have a goal.
_______ of taking a bribe(贿赂), the official was being investigated.
—What about the student in your class, Mr. Wang?—The doctor said that ________ sleep caused him poor memory and poor concentration.
____________ many times, but he still couldn’t understand it.
--- Aren’t you the chief editor? --- No, and I ______________.
The news spread all over the world _______that Kim Jong Il, top leader of the Democratic People's Republic of Korea (DPRK), passed away last Saturday at the age of 69.