l______the retired teacher is still working hard for the people .A.though old he is B.unless he is old C.old ao he is D.however he is old我觉得应该选A但答案是C,
问题描述：
l______the retired teacher is still working hard for the people .
A.though old he is B.unless he is old C.old ao he is D.however he is old
我觉得应该选A但答案是C,
答