Условие задания:

3 Б.
Choose the right variant:
 
1. Mr. Transom stared   at the group of students talking in the corner and they shut up immediately.
 
2. You know your father is the most   person in the world. He is sure to be wearing one of his old sweaters to the party.
 
3. People will need to see  provable information before they can believe in something like life on other planets.