The factory used 65 percent of the raw materials, the rest of which _____ saved for other purposes.
-- You look so tired.--- Yes. I _____ the house all the morning. But I’m finishing it soon.
Police in America have stepped up their search for a fifteen-year-old boy who went _____ three days ago.
There are _____ flights between the two cities, _____ it convenient for people in one city to travel to work in the other.
Though faced with so many difficulties, they are _____ about their future.
The Sahara Desert is almost _____ of the US.