public void ClearTrueAnswers()
{
ReadingTestPaper.RemoveCorrectAnswers();
ListeningTestPaper.RemoveCorrectAnswers();
// Xóa answers writing
for (int i = 0; i < WritingTestPaper.WritingPartOnes.WritingPart.Count; i++)
{
WritingTestPaper.WritingPartOnes.WritingPart[i].Answers = string.Empty;
}
}
