__ unemployment and crime are high, it can be assumed that the latter is due to the former.
_____is known to us all is that we should do as much as we can ______ stop the pollution of the environment.
If he_____his teacher' s advice, Asafa Powell would not be the fastest man in the world.
So suddenly _____ that the animals in the zoo looked very frightened during the total solar eclipse ( 日全食).
I wanted______cold meat but there was ______ left.
It is global warming, rather than other factors,_____ the extreme weather.