—People should stop using their cars and start using public transport. — _____ . The roads are too crowded as it is.
The policeman warned the driver ________ so carelessly.
Those ________ are not fit for the work should leave office at once.
When the expression first came into being, people refused to use it but _____ they began to accept it.
On hearing the sound, the birds flew away in every ________.
Punishments became more severe(严厉的), but he remained _________, that is to say, nothing could change his mind.