Every time you skip a question, be sure to mark it in time.
你每跳过一道试题，一定要及时标记。
2
The exam software allows you to mark questions to return to later, so you can skip hard questions and return to them.
考试软件允许您标记以后要返回的题目，因此您可以跳过难题，以后再回过头来解决它们。
3
If you want that one of these activities is run anyway, you can jump back to this activity and mark the other activities which need not to be executed again, for skip.