英文中thirty nine 和thirty-nine的区别?
英文中thirty nine 和thirty-nine的区别?
My mother is a nurse.She is ( )years old.这句话里面,是加thirty nine 还是 thirty- nine?有什么区别吗?还有像eleven seasons=33 months这种33,是写thirty-three还是thirty three?
另外,关于问句“Who`s this?”的回答“This is my uncle”,是要说this is还是this`s?