Question

He received__letter.(a/an/the)​

Answer 1

He received (a) letter

Explanation:

a is indefinite article

and here we aren't definite about letter details

so here we will use (a)

Answer 2

Answer:

hey buddy its (a) *uh

Explanation:

see if theres a vowel like (a, e, i, o and u)

we use (An)

Example: There is AN apple

but if there's a consonant we use (A)

Example: There is A troup standing there