Question

I have just had __________ great idea. *

Answer 1

The complete sentence should be:

I have just had a great idea.

* In the given sentence, an article was required.

* There can be two types of articles- definite( the) and indefinite( a, an).

* 'An' can only be used before vowels or words sounding like a vowel, hence it is not used here.

* 'The' cannot be used as it is used for specifying something in a definite manner and so we use 'a' here.