So far, there is no need to leave two words blank in your resume. The use of "up to now" in resume needs to pay attention to format, accuracy and consistency, so as to be easy for recruiters to understand and identify. Leave blank or fill in "Up to now" at the end time, indicating that you are still engaged in the work or study. These two words need not be left blank, such as "2065438+September 2005-Up to now".