Have you ever asked him the reason_____ may explain his absence?A.why B.when C.that D.what
问题描述：
Have you ever asked him the reason_____ may explain his absence?A.why B.when C.that D.what
答
c 此题为定语从句,the reason为先行词,从句may explain his absence缺主句,所以需要关系代词that来充当主语,此题易选A ,因为the reason why这一句式.若用why这个关系副词,从句需是个完整句子.