问题描述：
一些高一英文语法细节问题
1.professional作名词时可数吗?
2.it is certain that;i am sure that两者程度有何区别?
3.be to do怎么用?举例
4.a disappiont还是a disappiontment?
1.professional作名词时可数吗?
2.it is certain that;i am sure that两者程度有何区别?
3.be to do怎么用?举例
4.a disappiont还是a disappiontment?
问题解答：
我来补答展开全文阅读