, but he insisted that he to school ．
A. Though he was ill , went
B. He was ill, go
C. Having been ill, should go
D. Having been ill , went
网友回答
A. Though he was ill , went
(答案→)B. He was ill, go
C. Having been ill, should go
D. Having been ill , went
解析：but 为连词，引导并列句，前后应是完整的句子，可排除C和D，Though 不能与but同时使用，可排除A，insist 坚持要求，后用虚拟语气(should) do 结构，所以选B。