抽真空保存的无菌物品，可保存（）。

A.3～6个月

B.4～7个月

C.10个月

D.一年

E.2～3个月

Do you know the   __    boy? He is three years    __   than me.[ ]

A. young; younger

B. young; young

C. younger; younger

D. younger; young