Seems pretty good, I don't see a problem with your answers.
Question one: The answer is A
Question two: Also A
Question three: Still A
Question four: B
Question five: B
I hope this helps, and i am so so terribly sorry if it doesn't. I just tried my best to help :D
B. The explanation structure is incorrect making the sentence sound very jibberish.
Yes it is good
Do you need help with it or what?
