Thomas Alva Edison didn’t “invent” the light bulb (灯泡), but rather he ______ a 50 –year –old idea, which is not well –known.
The snowstorm ________ our difficulties.
Thomas wants to know ______Nina lives.
—Did you see Peter and Mike? — No, I saw ______of them.
When you don’t know a word, you can _________ in the dictionary.
— It's so cold today. — Yes, it'scolder than it was yesterday.