题目内容：

Only then __how important to keep the family together in time of trouble.A.had she realized
B.she realized C.did she realize Dshe had realized

优质解答

C did she realize only引导的倒装句,表示强调的语气.只有到了那时,她才意识到在遇到麻烦时保持家庭团结是多么的重要.