Download this file and make it available to students. Model how to right click on the pictures of the lady bug and how to right click and paste it next to the correct text answer. Be prepared to give one on one assistance to some students. You may need to place your hand over their mouse hand and model how to "right click, copy, right click paste" a few times.
You might use this copy and paste practice assignment alone or with another copy and paste assignment to provide additional practice. Perhaps collect several copy and paste exercises and plan to practice over mulitple sessions to allow students to acquire proficiency and mastery.