a or the ?

Read these sentences. Which word should you use - "a" or "the" ?

Fill in the gaps.

1. Ahmed goes to ___ school nearest to his house.
2. I read ___ same newspaper every day.
3. Susan sent him ___ postcard from Greece.
4. How many people are there in ___ room?
5. Where is ___ biggest shop in Bombay?
6. Please give John ___ call on ___ telephone.
7. Charles was ___ best student in ___ class.
8. ___ smile is better than ___ frown.
9. I wanted ___ job but couldn't find ___ good one.
10. Which is ___ quickest way to ___ shops, please?

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