creaking

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

"The dry-stone wall used a large, flat through to support the top stones. "

"My son wore his backpack to school every day, carrying his books and lunch. "

"She was carrying a heavy backpack to school. "

"My little brother likes to stay up late, so his bedroom is usually dark when I get home from school. "

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

"The architect prolonged the design phase of the new library, adding more time for planning. "

"to grate a window"

"The science class experimented with different substances to see how they reacted to heat. "

"The farmer's fields produced a bountiful harvest of tomatoes this year. "

"Students need to buy their textbooks before the first day of class. "

"On a recent windy day, hundreds of visitors climbed wooden stairs to take pictures in front of the glacier."