For nearly ten years, he ______ very few interviews or concerts. His simple life might have continued but for the great musician.
-It's said that scientists have made __________ big breakthrough in the cancer treatment. -If so, many people can have been brought back to __________ life !
The police __________ searching for the murderer everywhere when he suddenly appeared in a theatre.
Experiments of this kind __________ in both the U. S. and Europe well before the Second World War started.
After the explosion, every means __________ prevent the river from __________.
We students should __________ ourselves __________ knowledge, for the competition nowadays is very fierce.