-Whathasmadehimsoknowledgeable？-______domesticandforeignclassics．（）A.HavingexposedtoB.BeingexposedtoC.ExposingtoD.Exposedto

问题：-Whathasmadehimsoknowledgeable？-______domesticandforeignclassics．（）A.HavingexposedtoB.BeingexposedtoC.ExposingtoD.Exposedto

答案：↓↓↓

戚济民的回答：

网友采纳　　答案：B　　题干中是回答作主语的特殊疑问词what，要用动名词形式；beexposedto暴露在…之下，（长期）接触，短语搭配．根据句意，故选B．