In January , 2004, the United States successfully launched “Spirit”, a Mars Exploration Rover, _____ a new milestone in the history of mankind.
What does it matter whether you are rich or poor, ___ you are happy.
She wondered how it ___ that her husband met with trouble again.
He gave me a painting with his name ___.
The ___ of the heavy rain was the flooding of large areas of land.
Having ___ all of his father’s fortune, the son became a beggar.