___ with the problem,we should do something .

问题描述:

___ with the problem,we should do something .
a.Face
b.Facing
c.Faced
d.Having been faced

C
Faced with the problem,we should do something .面对此问题,我们应该采取某些措施.为什么不能用 face orfacing?因为前面这一部分不是句子,所以不选face。
如果没有介词with可以选facing。