I shall never forget those years _______ I lived on the farm with the farmers, _____ has a great effect on

my life. [ ]

A. when; who

B. that; which

C. which; that

D. when; which

中世纪的西欧流行着一则规矩：我的封臣的封臣，不是我的封臣。这是指[ ]

A．西欧封建等级制度    

B．丕平献土

C．西欧城市复兴      

D．琅城起义