–Can you come on Monday? –No, I am_______.
________evidence that language acquiring ability must be stimulated.
The professor could hardly find sufficient grounds _____his arguments in favor of the new theory.
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.