Here are the steps for you to import PDF file into a new mock paper,with the importing schema copied from an original mock paper:

1.Click 库管理->试卷管理->试卷列表 in the backend system,find the original mock paper you want to copy schema from,click the checkbox on the left,and click "复制" from the top right corner:

2.The backend system will recreate a new exam paper for you with the name "NEW EMPTY PAPER". Click the checkbox of the newly created "NEW EMPTY PAPER",and click "Choose File" to choose a pdf file in your local computer and then click "Upload Paper" to upload and import the new mock paper;

3.You can click the "题目" button on the right corner to review and verify all the questions are successfully imported:

4.You can create a new practice paper to copy the questions from this newly imported mock paper and assign it to your students now!

5.If you want to import the solution paper with the same index pattern as this practice paper,i.e. both the question and solution start with the 

same index format,like "1. 2. 3. " or "(1),(2),(3)" , just Click the checkbox of the practice paper ,and click "Choose File" to choose a pdf file

in your local computer and then click "Upload Solution" to upload and import the solution paper for the practice paper. The system will separate 

them and match them well and merge multiple pages into one for a single question:

6.You click "题目" link on the right side, and click "Open It!" to verify if the solution matched well: