-- Two bottles of apple juice, please.

-- Only one bottle is left. Would you like to have ___________, sir?

A．one

B．it

C．any

D．something

下列哪些物质组合的基本单位的是相同的（）

A.淀粉和纤维素

B.胰岛素和消化酶

C.烟草花叶病毒与艾滋病病毒的遗传物质

D.糖原与蔗糖