You can add questions from two surveys into one by following these steps:
1. Create a new survey.
2. Click on "Add Question" to open the question selection window.
3. Go to the "Question Library" section.
4. Click on "My Surveys" and use the "Choose Survey" dropdown to select the first survey.
5. Select all questions by checking the boxes, then click "Add Selected Questions" to import them.
6. After the last question, click "Add Question" again.
7. Repeat the steps, selecting the second survey from the dropdown.
8. All questions from the second survey will be added.