分类：教育/科学-学习帮助
问题：简单语法选择题8.Itwasafewdays___thepati 
8.It was a few days ___ the patient was ae to sit up and eat himself.A.since B.that C.before D.when
回答：C.before 

it was + time before .....
肯定句表示没有过了多久 就