—Whydoyoulooksoupset?—Therearesomanytroublesomeproblems...

问题详情：

—Why do you look so upset?

—There are so many troublesome problems ____________．

A．remaining to settle                                  B．remained settled

C．remaining to be settled                   D．remained to be settled

【回答】

C

知识点：非谓语动词

题型：选择题