中医望、闻、问、切四种诊断疾病的方法是由谁总结出来的[ ]

A．扁鹊

B．张仲景

C．华佗

D．孙思邈

— Why did they walk home yesterday?

— Because they ____ all their money. [ ]

A．spent

B．have spent

C．had spent

D．would spend