下载APP
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】If an occupation census had been taken in the eleventh century，it would probably have revealed that quite 90%of the people were country dwellers who drew their livelihood from farming，herding，fishing，...
A.
rebelled against the conformity expected of them
B.
moved around too much to study properly
C.
frequently changed their system of life
D.
left behind no written proof of their life