_____ from other continents for millions of year, Australia has many plants and animals not found in any other country in the world.
You’d be exposed to a lot ______ pollution if you moved to a town with pure water and air.
Some young people these days just ______ go out of their homes to contact the real world.
They produced two reports, ______ of which contained any useful suggestions.
Soon after dinner, Wayne drove off ______ the direction of Paris.
The newly-built shopping mall provides goods that compete ______ product quality, reliability and above all variety.