Solution:
Here, the sentence talks about the 'friend' as general class. Since we are referring to general things, we need to use the indefinite article 'a'.

Solution:
In the first blank, article "a" will be used as the goal is 'not specific'. In the second blank, the game is 'specific', hence, article "the" will be used.

Solution:
Definite article 'the' is used as an adverb before comparative degree. 'More you labour' is comparative degree.

Solution:
Here, the sentence talks about the 'orange' as specific class. Since we are referring to specific things, we need to use the definite article 'the'.

Solution:
Here, the location of 'church' is specified i.e. 'on the corner'. Hence, definite article 'the' will be used.

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Solution:
An is used before a word starting with a vowel or vowel sound. The blank shall take 'an' as it represents one of the English teachers.