The teacher was angry about his being late for class, but he behaved ______ nothing had happened.
such heavy pollution already, It may now be too late to clean up the river.
The spokesman didn’t make clear why the president failed to attend the conference.
One may never know the of knowledge without being educated.
This is the first time we a film in the cinema together as a family I mention it I feel very happy.
Tom’s pay depends on the factory.