He is the only one of the people here who ____ how to operate the computer.
He intends to apply for _______ permit from the government to export goods of ______ high quality to Russia.
The police tried to get some clues from the suspect, but he remained______.
________by the advances in technology, many farmers have set up wind farms on their land.
Not until I began to work ____ how much time I had wasted.
It was_______ that they went for a drive in the countryside.