—Whydoyoulooksoupset? —Therearesomanyproblems

問題詳情：

 —Why do you look so upset?

  —There are so many problems ______.

  A. remaining to settle                            B. remained settled

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

【回答】

C

知識點：非謂語動詞

題型：選擇題