A professor of biology gave a talk to more than 1000 students on elephants living conditions and the dangers _______ them.
At the foot of the mountain______.
The hurricane damaged many houses and business buildings;______,it caused 20 deaths.
__________ fired, your health care and other benefits will not be immediately cut off.
So difficult____it to work out the problem that I decided to ask Tom for advice.
_______homework did we have to do that we had no time to take a rest.