my favourite pet is dog这句话有错么?dog加复数么?my favourite pet is dog这句话有错么?dog加复数么?when is your birthday?这句话的回答直接用in may来回答 为什么?

问题描述:

my favourite pet is dog这句话有错么?dog加复数么?
my favourite pet is dog这句话有错么?dog加复数么?
when is your birthday?这句话的回答直接用in may来回答 为什么?