CD22错题数和最后得分的关系？

I think there is nothing between the last two GWD22s and the score you would make in the coming test.  GWD22 is used to prepare for the test and since some parts of questions have been tested in the real test, lots of CDers regard GWD22 a mock examination that ought to be left to the end of the prepartion process.  

If you want to have a close score evaluation, you'd better choose GMATPRE.  But be sure that you use it only once or you will get a higher score for nothing

谢谢恢复！受两套CD成绩打击，正在整顿心情，继续复习.