I’m completely _______ at the way _______ his wife has treated him.

The pictures made me think of the days _____ we spent in Beijing.

Crusoe’s dog became ill and died,         made him very lonely.

 Astronomers and scientists think that a black hole is a region of space ______ which matter has fallen and _______ which nothing can escape.

He had collected plenty of historical evidence,       proved that humans used to have different sleeping patterns.