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Supercat Posted 9 years ago
Grammar

XXX Is A [noun] That ~?

A sentence starts:

XYZ is an observatory that has a large mirror and some electronic devices.
Is a/an okay? I'm sorry that I don't remember well.

  

Top answer

Yes, observatory starts with a vowel sound.

  • Yes, observatory starts with a vowel sound.
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2 Answers
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Yes, observatory starts with a vowel sound.

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Sorry, I thought you were asking about the difference between 'a' and 'an'.

XYZ is an observatory that has a large mirror and some electronic devices. This implies it is one of many such observatories.

XYZ is the observatory that has a large mirror and some electronic devices. This implies it is the only such observatory.

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