Question

______, 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

Answer 1

B

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。