题目内容：
He has been learning English for years.
参考答案：
答案解析：
选择题：He has been learning English for years.
- 题目分类： 大学英语B级
- 题目类型：选择题
- 查看权限：VIP
简析庐隐小说题材和思想特点
简析庐隐小说题材和思想特点
I could hardly agree to what you said just now
I could hardly agree to what you said just now
高等植物叶绿体具有（）、（）、（）和（）等四种色素。
高等植物叶绿体具有（）、（）、（）和（）等四种色素。
I came here at least once a month.
I came here at least once a month.
How long have you collected your stamps?
How long have you collected your stamps?