belay

"The teacher was signaling to the students to be quiet by raising her hand. "

"I brush my teeth regularly to prevent them from turning yellow."

"The cat disappeared behind the sofa. "

"The face of the cliff had many projections that were big enough for birds to nest on."

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"The protesters thronged Trafalgar Square and sang anti-war songs."

"My backpack was securely fastened to the chair, so I knew my books would stay put during the presentation. "

"The camping equipment was essential for a successful weekend trip. "

"The librarian is securing the valuable books behind a glass display case. "

"Can you fasten these boards together with some nails?"

"The complicated instructions on the new software difficult me from completing the project on time. "

"I experienced a lot of new things during my summer vacation. "