There are waiting-rooms in the new station, about 1,000 passengers.
The man, ____ is parked in front of our school, is a well-known politician.
---Is Medicine a science? ---Well, nowadays, most doctors recognize that medicine is ____ it is a science.
---The book is borrowed from the library. You ____ your children touch it with their dirty hands. ---Sorry.
____ is none of your business.
---Why are the four students so happy? ---_______ in the science competition, they are awarded prize money totaling $20,000.