— How about buying Sam a mobile phone? After all, he isn't a boy any more.

— I think it necessary, for we sometimes want to make sure if he _______ home for dinner. [ ]

A. will come  

B. comes  

C. has come  

D. would come

判定急性胰腺炎严重程度的评分可用（）。

A.Ranson评分

B.Ramsay评分

C.SOFA评分

D.LODS评分

E.SAPS评分