That will help support the investigation, you may pull the corresponding error log out of your Website server and post it our help staff. Remember to involve the Ray ID (which can be at the bottom of this error web page). Further troubleshooting methods. 在国外读书就要尽量按照国外考试的要求来完成，不能有任何的质疑，按照要求顺利通过考试才能够拿到学分。但是对于留学生来说，考试不是容易的... http://andre1v653.full-design.com/The-Basic-Principles-Of--53439126