question: it is clear that the burdens of the war had to be particularly intolerable for the most backward countries. russia was the first to be compelled to leave the field.
Capitalize this past sentence correctly.
A: It is clear that the burdens of the war had to be particularly intolerable for the most backward countries. Russia was the first to be compelled to leave the field.

question: new photos from nepal…
Capitalize this past sentence correctly.
A: New photos from Nepal…

question: mortal sin cannot be purified in purgatory.
Capitalize this past sentence correctly.
A: Mortal sin cannot be purified in purgatory.