单选题He tried hard to kee

问题补充：

单选题Hetriedhardtokeepcalminfaceofthepolicemen,butthesweatonhisforehead_________.A.turned him downB.gave him awayC.showed him outD.shut him off

答案：

B解析本题考查动词短语辨析。句意：面对警察，他努力保持冷静，但他额头上的汗让他露出了马脚。give away出卖。turn down拒绝；show out送出（客人）shut off关掉，与shut down意思相近。