Catherine bought a postcard of the place she was visiting, addressed _______ to _______ and then posted it at the nearby post office.
Many workers were organized to clear away_______ remained of the World Trade Center.
A survey was carried out on the death rate of those who were infected by SARS, _ _______were surprising.
In recent years much more emphasis has been put______ developing the students productive skills.
_____ their real economic situations, they got some relief fund from the government.
Modern science and technology has _____ communication between people far apart.