—Have you been teaching here since graduation?

—No, I _____ on a farm for five years．

A．had worked

B．have worked

C．was working

D．worked

下图是人体内糖代谢过程的简图，请分析以下叙述错误的是（）

A.如果图示的细胞是肝细胞，则图示中A所示的物质最可能是肝糖元

B.如果图示的细胞是肌细胞，则该细胞不具备细胞周期

C.图示中的④过程会使细胞中ADP的含量上升

D.如果人体内甲状腺激素浓度过高，则图中②的过程将加快