-Excuse me, has the film already ________?-Yes. The film ________ for about ten minutes.
We are often told _____ at people in trouble.
The old woman kept one black dog and two white ____.
–Is this orange radio _____? -- No, it belongs to ______.
______ book on the desk is _____ useful one.
–How many _____ are there in your school, Tom? -- Two.