For Question 7, the correct answer is **B. much safer**. The use of "much" already emphasizes the degree of safety, so "more safer" is incorrect as "safer" is already a comparative form.

For Question 8, the correct answer is **A. far**. "Far" is used to indicate a greater degree of difference, while "further" is typically used to refer to physical distance or extent in a more abstract sense. Thus, "far hotter" is the appropriate phrase.