I have been able to fill the blank spaces with the correct words.
"Monotonous" is actually used when one is describing something that is becoming tiring due to performing it repeatedly. The speaker would have "furious" if they didn't make it to the hot air balloon ride. Then the speaker was excited because the weather was "favorable" and therefore they could go for the hot air balloon ride. He was excited and therefore could tolerate the excitement of his sister. When they got there, he saw that the numerous instruments were reliable and the view was "miraculous". The many riders waiting for their ride made him know that the pilot might be "prosperous". But the pilot couldn't charge more because he seemed to be an "honorable" man.
