The physics teacher told the students to observe carefully what would happen when a (n) _____ acted on the object.
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.