第1个回答 2013-09-12
This question is too difficlut for me,I can't wook out it.
第2个回答 2013-09-12
the problem is too difficult for me to work out it
第3个回答 2013-09-12
It's too hard for me to work it out.
第4个回答 2013-09-12
it is too dfficult to make out.
the question is so hard for me that i can't work it out
第5个回答 2013-09-12
the question is so difficult that i can`t work it out