第19题: [单项选择]There are ______ incurables; there are only things for which we have not found a cure. A. no such a thing as B. not such a thing as C. not such things as D. no such things as 参考答案:D 答案解析:此题考查存在句式主谓一致的问题。由于题干的系动词为复数,因此只能在C项和D项之间进行选择。C项not为一般的否定副词,而D项no为其强化的形式,相当于not any,表示与所说的事截然相反,意为“绝没