Work gets done __________ when people do it together and the rewards are higher too.
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.
— How is the result, doctor? — Well, your health is ______ good, but you do have a few minor problems.