单选题She is said _____in 

问题补充：

单选题Sheissaid_____intheUnitedStatesforfouryearsbeforeshecamebacktoworkinourcompany.A.to studyB.to be studyingC.to have studiedD.studying

答案：

C解析常用句型 sth/sb is said to do ....据说。。。题中出现了for four years 说明要用完成时。