Being examined twice a year,whether it is a ear or a bus or a truck,is the rule that everydriver _______obey in this city.
______________breaks the law should be punished.
The government has to close those small factories to prevent the water of the river ______.
—Will you go swimming with me this weekend? —______.
21.Bob got seriously injured in the traffic accident, but luckily, the doctor came __________to save his life.
He sighed again and the failure in physics seemed to have completely ______ his confidence.