Cause and appear because these words need to be singular since the other words are plural
To judge whether or not a conclusion is successful, simply look back in the story and try to relate things in the story with the conclusion. Depending on what you find will determine whether or not the conclusion is successful.
She acted quickly to find a solution.
They walked slowly through the woods.
Gordon spoke loudly to Chief Crazy Horse.
What you apparently see may be a mirage.
I hope this helped :)
