She is said _____in the United States fo
问题:
She is said _____in the United States for four years before she came back to work in our company.
A.to study
B.to be studying
C.to have studied
D.studying
She is said _____in the United States for four years before she came back to work in our company.
A.to study
B.to be studying
C.to have studied
D.studying