hollow

"The coffee concentrate was strong, so a little went a long way. "

"The teacher's smile was a significant of approval for my hard work. "

"The documents pertaining to my car insurance claim are now all submitted. "

"Please completely fill in the box for your answer, using a number 2 pencil."

"The flowers were artificial, and he thought them rather tacky."

"Construction is underway on the new bridge."

"The word "gugugu" is meaningless in English."

"Can you demonstrate the new tools for us?"

"The loud clap of thunder was reverberating through the valley, echoing off the mountains again and again. "

"The explanation was long and drawn-out."

"The gymnast performed a perfect handspring before landing smoothly on the mat. "

"The foundation of his institute has been wrought with difficulty."