— Come on,  please give   me some ideas about the project.   

— With so much work filling my mind, I almost ____.      [ ]

A. break up      

B. break out  

C. break down

D. break off

最常见的良性骨肿瘤为（）

A.骨髓瘤

B.骨软骨瘤

C.骨巨细胞瘤

D.骨囊肿

E.骨瘤