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:)
I believe your answer would be B ;). Hope this helps!
I can’t write a whole essay, but here’s a few factors. People help eachother because it makes them feel good, some people believe that they are better people than others for helping people, others help because of their religion, like churches going on missions to other countries, some do it because they have been in a similar situation and don’t want to see the other person suffer.