his father has been away for more than one year, John can still keep doing what he needs to.
The police tried to get some clues from the suspect, but he remained ______.
The engine of the ship was out of order and the bad weather _____ the helplessness of the crew at sea.
The electric library made it impossible for teachers to have ______ to a large amount of information online.
Some kinds of birds in winter fly to the south to ______ the cold in the north.
We must apply what we have learned to our daily work because in no case _____ from practice.