Write the next sentence in this paragraph:

How to set up a trampoline
Check the packages.
All of the materials for a trampoline will usually come in two or three packages. Empty each of the packages and make sure that you have everything that is listed in the instructions.

Select from: i. In the growing season, you may always need to look up an additional trampoline to help you get your friend used to trampoline jumping. Check and see if there are any durable materials that you may need for trampolines, like waterproof blocks or vinyl ones.; ii. A missing piece can prevent you from setting up the trampoline properly, so you don't want to begin putting it together without double checking that you have everything you need. If there is a missing piece, call the company you bought the trampoline from and see what can be done about it.; iii. Then use the counter attendant or toll free coin store to collect all of the materials listed in the box. Use your hand to bring the simple box to your trampoline.; iv. If there are more than one flat spot on the trampoline, you may have to choose between the two types of trampolines that you use. One might be necessary to keep the trampoline in place, while the other might be necessary to protect surfaces from the trampoline.;
ii.