So badly ______ in the car accident that he had to stay in hospital for a few months.
【正确答案】 C
【答案解析】解析:副词so放句首,句子主谓要倒装。so badly在句中作状语,放句首表示强调。原句是“Hewas injured so badly in the car accident that...”,倒装时只要把系动词或助动词移到主语前面就可以了。因此答案选C。