After leaving college, Mike was employed in an international company and _____ there ever since.

A．worked

B．has worked

C．had worked

D．was working

下列情况能使肝脏生成酮体过多的是

A．肝功能增强

B．肝中脂代谢紊乱

C．肝功能减弱

D．糖供应不足

E．脂肪转运障碍