You can move multiple questions from one Question Bank to another.
Click the Quizzes link.
Click the Manage Question Banks button.
Open the Question Bank by clicking the title of the Question Bank.
Click the Move Multiple Questions button to move multiple questions to another question bank.
Verify the bank is unbookmarked.
Select questions to move [1] and select the destination bank [2]. Then click the Move Questions button to move the questions to the selected bank.