Scentence 3 because it is telling you what the problem is in the story! hope this helps!
In my opinion it's A. because 'around is a preposition and 'the corner' will be part of the prepositional phrase... meaning that's already a prep. phrase.
The answer is C passage A use compares the weather being cold, and the weather is hot. Passage B shows when each step happens
The answer IS c, it just makes common sense why it would be c.
What do you think postmaster have done when he received lencho's second letter? According to me at a moment the postmaster felt very sad because he was expecting something totally different but he recieved something that he never have