To add copied question to existing subject
1.Login as Teacher.
2.Click on "Multi Choice Questionnaire" TAB.
3.Click on "Add Question to your question bank".
4.Select "Copy from shared bank".
5.Select "Subject-Topic".Click On show data button .
6.To copy shared bank in existing subject-click on "copy all these question" button.
7.select "copy all" option.
8.select existing subject and click on "add to my question question bank" button.
Copied question can be viewed in "Your own question bank".