<span>"B. hoping to keep his shoes dry</span>" is misplaced here. The way this part of the sentence is placed currently implies that Billy didn't necessarily do this act consciously.
For the first question, the answer would be D. (It supports the idea that living in a foreign country is the smartest way to learn a new language)
D: Language researchers found that students who lived in a foreign country learned the new language sixty-five percent faster than students learning at home.
The counterclaim is something that counteracts the statement. Therefore, for the second questions, the answer should be B.
B: However, learning to play an instrument has been proven to improve grades and test performance.
D. By using imaginative and descriptive language.
You must note that the reader most likely will not know how the area looks like, specifically if it is a fictional book, leaving it up to the writer to describe how the landscape looks like, as well as hinting how it will affect the story's plot.
Answer: Hecate is angry because the 3 witches have made prophecies to Macbeth without telling her.