it is difficult to do sth对还是it difficult to do sth对

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/13 06:22:03

it is difficult to do sth对还是it difficult to do sth对

it is difficult to do sth是对的

第一种正确 is的意思是“是”
这是一个主系表结构,意思是....很困难