My grandfather is not willig to move to the city for he ___ to the life in the country

题目

My grandfather is not willig to move to the city for he ___ to the life in the country
A used
B has used
C has been used
D had been used

答案

选C.
我的祖父不愿意搬到城市去,因为他已经习惯住在乡下.F：
My grandfather is not willing to move to the city,because he has been used to living in the countryside.