Question

this bog is heavy. I am _______ to lift it​

Answer 1

Explanation:

this bog is heavy. I am unable to lift it

Answer 2

Sentences given with a blank(corrected all mistakes) :

This box is heavy. I am _____ to lift it.

What to do?

→ Filled the blank with appropriate words ( past of speech).

Answer : tired

Let's see $\large\mathbb\red{HOW? }$

First we need look the two sentences, simply to check the sentence means. Here, at the first sentence it given "heavy" so, according to the it we need a verb.

S+V+O is the simplest form of sentence , and at the second sentence we need a Verb. So, tired is the appropriate word.

$\rm\blue{So,done!}$