1.Although she worked hard,she found difficult to please her boss.(选错的)
      (A)               (B)                      (C)            (D)

2.Choose the one that is grammatically correct.
(A)I found impossible for us to work ..

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1.   found difficult =v+ adj 可以吗?是 v+adv吧
    可改为 found hard 或 found too difficult


3. I think ___ a pity that you didn't try harder

  S+Vi+ it + N +that + S+ V~~~~~

2.Choose the one that is grammatically correct.
(A)I found impossible for us to work together.
(B)I found it impossible for us to work together.
(C)Ifound it impossible for us work together.
(D)I found impossible for us working together.
==> (A)的话省略了几个字I found (that it is) impossible for us to work together.
    (B)(C)(D)参考上面说明

感谢大家的回答
我另外在知识+有提问，提供其他大大的解答给大家参考一下
http://tw.knowledge.yahoo.com/question/question?qid=150904290...commend=0&.crumb=9pQCrKlQptV

看了大家的解答，第2题的答案似乎是B才对
其实这些题目是我在读it当虚受词这个单元的考题范例
下面是我在网路上找到的关于it当虚受词的教学
http://www.nani.com.tw/nani/slearn/sle...3/Chapter13_1.htm
里面我不了解的是it在什么情况下可以不加
我想这就是关键所在
感谢哪位大大能为小弟解答一下
另外第3题的D是不是前面加that就可以选了，难道that不能省略么?
像S+V+that+S+V 这种句型在什么情况下that可以省略?