Mr. Joe, ________ professor at the University of Fribourg, is famous for his academic achievements in ________ World History.
It was thought to be ______ adventure for him to walk across ______ Sahara Desert alone.
The teacher was worried about the boys in her class, for they spent ______ time playing computer games.
Luckily, there is a hospital ____ and they soon took the wounded man there.
My son ____ the examination, but he wasn't careful enough.
---- Must we clean the house now? -----No, you _______.