Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to clean drywall dust [title] Block off all vents and openings with plastic sheeting. [step] Heavy-duty plastic sheeting helps to minimize how much dust gets dispersed through the air. Cover all the openings throughout your home, such as doorways and windows, with it.

Ending1: [substeps] Make sure you use ordinary plastic or metal sheet as the base for your new drywall. [title] Cut plywood down to the right length to clean the walls. Ending2: [title] Ventilate smoke-free spaces whenever possible. [step] If you have a live-up smoke detector, ensure that the unit is on a low-to-moderate level. Ending3: This will help keep dirt and debris out of the room. [substeps] Installing a sliding-screen door, shed door, etc. Ending4: For best results, hang the sheeting from floor to ceiling. [substeps] Cover all of the air vents and ductwork.

Answer format: ending1/ending2/ending3/ending4