The happiest people don't have the best of everything. They just _______ everything. [ ]

A. get away from    

B. make the best of      

C. fix attention on    

D. catch up with

气管肿瘤中，如在肿块内见到钙化，往往提示为软骨病变，则诊断应先考虑（）

A.软骨瘤

B.神经鞘瘤

C.纤维瘤

D.腺瘤

E.错构瘤