The door and the windows were all closed and there was no ___________ of forced entry.
Large quantities of china made in Dehua __________ to the US and Europe.
-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 __________.