Do the umbrellas belong to those _____________(邮递员)?
I introduced Lucy to Mike and now they’re _____________(已婚的).
Is the wooden house hidden _____________trees? (在……中)
The charity walk becomes even __________ because you have to finish walking a 100-kilometre trail within 40 hours.（艰难的）
They discussed for a long time, at last they reached an ____________. (协议)
_________ (luck), he didn’t catch the last bus back home. He had to walk. 
Tough the cartoon _____________ (it) was not interesting, it still attracted many kids.
None of my classmates can swim _____________ (far) than I can.
Every time you answer a question __________ (correct), you will lose a point.
Computers were one of the greatest __________ (invent) in the last century.