女性，62岁。诊断为胃癌，血压160/100mmHg，中度贫血，消瘦。术前准备不必要的项目是（）

A.纠正贫血

B.改善营养状态

C.检测肝功能

D.血压降至正常

E.血生化检查

It was __________ you had done ________made it possible for you to improve  your English.                                

A．that/ that

B．that / what

C．what/ what

D．what/ that