Answer:
a. on
b. I don't think here a preposition is needed as "This is the key to my room" is a complete sentence.
c. in
d with
Hope it helps!!
Have a nice day:)
What myth is it talking about??
The definition of tranquility that is most likely suited for this line is calmness: peacefulness.
That is what the word tranquil means.
this does not give me good detail i need more to help u