— I called you yesterday evening, but you were not in .

— Sorry, I ________ in the shop with my mother.

A．am

B．will be

C．was

D．have been

男，24岁，肥胖，一日前新诊断为2型糖尿病，首选治疗方案为（）。

A.饮食控制和体育锻炼

B.双胍类降糖药

C.减肥药物

D.口服磺脲类药物

E.胰岛素