Fill in the blanks with suitable words

1.___There is___ a library next to2.All the students went home.__There aren't any__students in the classroom.
3. ______ 50 states in the United States.
4. No,_______
polar bears at the South Pole.
5. A:_______
a message for me? B: No,______
6. Why_____ so many cars in the parking lot?
7. A: I'm hungry. B:_______
a restaurant across the street.
8. How many days_______
in March, thirty or thirty-one?
9.____________ a few things I have to do this afternoon.
10. A:_________
a post office nearby? B: I'm sorry, I don't know.
11._________ something I can help you with?
12. No,___________ public holidays next month.
13. How many countries _____ in the world?
14._________ a woman in the picture. She is smiling.
15._______________ only three more days before the exam. Let's study!