7.
Your Answer is
Correct Answer is B
Explanation
"The former sentence "Weiping said that in order to create a low pitch, he made a deep hole", and the latter sentence "a high pitch requires a shallow hole" are contrastive, so Conversely is correct.
Item A: nonetheless "even so" means a concession relationship.
Item C: "otherwise" does not match the logic between sentences.
Item D: even so "even so" It is also a concession relationship."