---Whydoyoulooksoupset?    ---Therearesomanytroublesom...

问题详情：

 ---Why do you look so upset?   

 ---There are so many troublesome problems _____.

   A. remaining to be settled                B. remained settled 

   C. remaining to settle                   D. remained to be settled

【回答】

A

知识点：非谓语动词

题型：选择题