_____ this something, still unseen, they gave the name radium.
It was the soldier did at the spot of the accident, not what he said, moved all the citizens of the whole city.
I was so familiar with him that I recognized his voice I pick up the phone.
---How often do you call your parents?--- ,but usually once a week.
Though computers can do a lot of work man can’t do, they can’t completely _______ human beings.
Can you think of some cases________drivers obviously knew the traffic rules but didn't obey them?