You can use “Split” to get one page or several pages out of a pdf file. The steps are:
1. Open the original pdf file.
2. Tap the “Pencil” button at the upper right corner to enter editing mode.
3. Tap the “Split” button on the toolbar.
4. Select the page before and after the pages you want. ( a red dotted line will show after you select).
5. Tap Done button.
You will get three pdf files. The second one should be the single page pdf.