In English, articles are used before nouns to indicate whether the nouns are specific or unspecific. The articles in English are 'a,' 'an,' and 'the.'
'A' is used before words that begin with a consonant sound.
'An' is used before words that begin with a vowel sound.
'The' is used when there is something specific or already known by the listener and speaker.
Here's how you would fill in the blanks for your question:
A doctor - 'A' is used because 'doctor' starts with a consonant sound.
An egg - 'An' is used as 'egg' starts with a vowel sound.
The Ganges - 'The' is used because it refers to a specific river.
A young man - 'A' is used as 'young' starts with a consonant sound.
A teacher - 'A' is used because 'teacher' starts with a consonant sound.
An old man - 'An' is used because 'old' starts with a vowel sound.
The Taj Mahal - 'The' is used as it is a specific famous monument.
A dancer - 'A' is for a non-specific dancer, starting with a consonant.
A book - 'A' is used since 'book' starts with a consonant sound.
A cat - 'A' is used because 'cat' starts with a consonant sound.
The Red Fort - 'The' is used for the specific historical fort.
An ice-cream - 'An' is used because 'ice-cream' starts with a vowel sound.
An honest man - 'An' is used since 'honest' starts with a vowel sound.
An orange - 'An' is used because 'orange' starts with a vowel sound.
An aeroplane - 'An' is used because 'aeroplane' starts with a vowel sound.
An hour - 'An' is used as 'hour' has a silent 'h,' starting with a vowel sound.
An ant - 'An' is used because 'ant' starts with a vowel sound.
A table - 'A' is used since 'table' starts with a consonant sound.
A car - 'A' is used because 'car' starts with a consonant sound.
An umbrella - 'An' is used because 'umbrella' starts with a vowel sound.
This exercise helps in understanding how to properly use articles, which are essential in English grammar for indicating specificity and sound.