1．(2019·南京模拟)Sometimes tests are needed ________ doctors discover exactly what's wrong with your body.
A．since B．before
C．although D．if
解析：选B 句意：有时在医生准确发现你的身体出了什么问题之前做检查是必要的。since“因为，由于”；before“在……之前”；although“虽然，尽管”；if“如果”。根据前后句的关系，可以判断出检查应在医生诊断之前，故选B。
2．My friend Miriam felt it was out of ________ question for her to visit China without going to see the terracotta warriors, so I helped her arrange ________ tour to Xi'an.
A．/; the B．the; a
C．/; a D．the; /
解析：选B 句意：我的朋友Miriam认为没有去看兵马俑来中国就毫无意义，所以我帮她安排了去西安的观光游。out of the question“不可能；根本谈不上”，out of question“毫无疑问”；tour是可数名词，这里指一次观光。故选B项。
3．They are college students and don't realize ________ to start and run a company.
A．what takes it B．what they take
C．what it takes D．what takes them
解析：选C 考查宾语从句。句意：他们是大学生，没有意识到创办和经营一家公司需要付出什么。动词realize后是宾语从句，要用陈述语序。表示“花费某人……做某事”用it takes sb. ...to do sth.，此处指“付出什么”是特殊疑问句，应用what引导。故选C。
