引起牙齿病理性移位的因素是()

A．牙周炎引起的牙槽骨吸收

B．牙周肉芽组织

C．牙缺失后长期未修复

D．吐舌习惯

E．以上均是

—Have you found your lost mobile phone?  

—No, I haven't. But I bought _____ yesterday. [ ]

A. it          

B. one            

C. another        

D. other