Question

Fill in appropriate prepositions - I have been waiting for you ....... 3 hours ...... 8:30 am.

Answer 1

I have been waiting for you for 3 hours since 8:30 am.

Hope this helps you friend...

Be brainly ✌✌

Answer 2

$\huge \bold{Answer}$:

↪I have been waiting for you$for$3 hours $since$8:30 am.

Explanation :

Preposition : A word that describes the place of an object is called as a preposition.

Here, for is a preposition of time.

Whereas since is also a preposition of time.

Here, in the sentence,

They mentioned 'waiting for you' so, we shall use preposition of time. For and since suits the best so I have used for and since in the above answer.