At the crossroads, you have to drive very ________ to avoid traffic accidents.
The job market is competitive. Therefore, you have to be _________ knowledge and skills in order to employed in the future.
His first book _________next month is based on a true story.
Only when his mother died ________ how much he loved his mother.
The girl looked at me with a _______expression. Maybe the problem was quite ________.
Electric trains have now _______ steam trains in England.