题目内容：

英语 几个英语的 快、 (31 21:34:10)
1、---Excuse me.Look at the sign "No photos" .---Sorry,I ________(not see) it.
      我原来写的是haven't seen,正确答案是didn't see,可是这个行为是对现在造成影响的,为什
     么用一般过去时?
2、It's wise ___ you to take a map and a mobile phone.
     是of 还是for?是指这件事是明智的还是人是明智的?
3、The question is hard ____（answer）.
      这里是被动语态吗?