Question

________ such a difficult task, we must redouble our efforts.

1. A.
   To face with
2. B.
   We are facing
3. C.
   Faced with
4. D.
   Facing with

Answer 1

C
此处用非谓语动词的过去分词。句中face为及物动词，且face=befaced with表示“面临”的意思。