lubricant

"The old door was squeaking every time someone opened it. "

"My stomachache caused me a lot of discomfort during the test. "

"My teacher fostered a classroom atmosphere of intimacy, encouraging students to share their ideas openly. "

"The scientist carefully examined the substance to determine its chemical composition. "

"The online personal for finding a book club partner was very popular among students. "

"The new math strategies were applied successfully in the classroom. "

"The seamstress used a sturdy between to create a precise, even stitch on the thick upholstery fabric. "

"The friction between the pencil and paper allows us to write. "

"My grandmother needs her medication, so we went to the pharmacy to pick it up. "

"The waiter carried the trays of food smoothly, avoiding any spills. "

"The children collected colorful objects from the beach, like seashells and smooth stones. "

"Option 1 (Focus on table): "The child drew a picture on the surfaces of the wooden table." Option 2 (Focus on liquid): "In the science experiment, bubbles formed on the surfaces of the water." "