Step 1: First blank.
Phrase: “There is much difficulty __________ getting...”
The correct preposition here is
in. The idiomatic expression is “difficulty in doing something.”
\Rightarrow So, “difficulty in getting...” is correct.
Step 2: Second blank.
Phrase: “...getting __________ this place...”
Here, the required preposition is
to. The expression is “getting to a place.”
\Rightarrow So, “getting to this place...” is correct.
Step 3: Third blank.
Phrase: “...not possible to reach __________ without the grace of the lord.”
The object of “reach” must refer back to “this place.” Hence, the pronoun must be
it.
\Rightarrow So, “reach it...” is correct.
Step 4: Verify full sentence.
Final version:
\[
\text{There is much difficulty in getting to this place and it is not possible to reach it without the grace of the lord.}
\]
This is grammatically correct and meaningful.
\[
\boxed{\text{in; to; it}}
\]