When we meet in the street,we always________hello________ each other.     [ ]

A. say ; to                                

B. tell; to    

C. say ; for                              

D. tell; for

一般良性骨肿瘤（）

A.生长慢有症状 

B.生长快无症状 

C.生长慢无症状 

D.生长快有症状 

E.生长慢有疼痛