There is a possibility that these hens could be frightened and lay fewer eggs a sudden loud noise.
Many workers were organized to clear away remained of the World Trade Center.
The organization broke no rules, but ______had it acted responsibly.
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.
_____ of water makes Death Valley a desert, but it is by no means devoid.