* * 乳晕常见的缺陷有
A． * * 内陷
B． * * 肥大
C． * * 发育不良
D． * * 缺损
E．乳晕过大
参考答案：A,B,C,D,E
She showed the visitors around the museum, the construction________had taken more than three years.
A．for which
B．with which
C．of which
D．to which
Zhu Zhiwen's never been to Hongkong, ______? [ ]
A. is he
B. isn't he
C. has he
D. hasn't he
