下列句子中，哪个是正确的从句结构？
答案解析
本题考察从句结构的正确使用。正确答案是A. I think that he is right. 这是一个完整且正确的从句。B. I think he is right that.缺少连接词，C. I think that is he right.语序错误，D. I think he right that is.语法错误。
正确答案：A