C. One who intrudes on another's land, trade, or affairs.
The meaning of impending used in the sentence was C. About to happen
Can you put the question?
1 = I don't think the mail has arrived yet.
2 = Nobody has bought him a present yet. (?)
3 = We have been here for forty minutes already.
Lol I hope this helps- About the second one, I didn't know whether or not it was correct, but I think all the others are!