The doctor insisted that I more fruit and vegetables.A. tookB. had takenC. would takeD.

问题补充：

The doctor insisted that I more fruit and vegetables.

A. took

B. had taken

C. would take

D. take

答案：

A. took

B. had taken

C. would take

(答案→)D. take

解析：考查虚拟语气：insist做为“坚持要求”，宾语从句用sb （should） do，如果是“坚持说”，宾语从句就不用虚拟语气，句意是：医生坚持要求我多吃水果和蔬菜。选D。