mr green said he ( )in the school for about twenty years

问题描述:

mr green said he ( )in the school for about twenty years
Aworked B works C is working D had worked
说原因

D

这是相对said这一过去的动作来说的, 过去的过去, 所以用过去完成时

翻译: 格林先生说他在这所学校工作了大约20年之久