— What’s up?
— There are so many problems .
A. remained to be solved
B. remaining to solve
C. remained solving
D. remaining to be solved
网友回答
A. remained to be solved
B. remaining to solve
C. remained solving
(答案→)D. remaining to be solved
解析：考查动词remain用法。动词remain可以转换成remaining剩下的；固定搭配sth remain to be done某事有待于被做；形容词remaing和remain to be done合在一起形成形容词短语remaining to be done修饰前面的名词。句意：—怎么了？—有很多问题有待于被解决。故D正确。