54.

Unlike using spices for cooking, in medicinal usage they are taken in large quantities in order to treat particular maladies.

A.  unlike cooing with spices, taking spices for medicinal use is done

B,  In cooking, small quantities of spices are used, whereas in medicinal usage spices are taken

C  In cooking, the usage of spices is in small quantities, whereas in medicinal usage they are taken

我选的是C, 可是为什么答案是B呢,我觉得C 的两个USAGE才对称呢,而B中关于USE的词性并不一样啊

 

80.

Children's programming was once limited to a few hours a week, but now there are at least four cable networks dedicated entirely to shows produced specifically for children.

划线句子就是正确选项,但是我想知道电缆网是怎么被动的DEDICATED的, BUT后面的句子我不太会翻译,谁能帮我解释一下?