In order of the questions, the answers are D,C,C,C,A,B,C,D,A,C,C,B,D. the main problems were that there were missing prepositions, a lack of pluralizing nouns, and incorrect verb tenses.
Gregor was quite confused of how he changed in the dream therefore he was heavily affected by it and soon came to past. He felt sad when the raindrops pittered and pattered on the window pane which indeed matched his mood of how he was. But when his mother asked him if he wanted to go somewhere he replied in a forced but uncertain tone. Henceforth he felt partially full because of the meaning of how it had happened.