初二英语关于比较级的倒数三题帮忙看一下有没有错还有没写的咋写谢谢

Question

如题所述

Answer 1

Mary is taller than all the girls in her class. 这个是复数
Mary is taller than any other girl in her class. 这个是单数

Physics is more difficult than English.
English is not more difficult than Physics.
English is less difficult than Physics.