nullifies

"The teacher's announcement nullified the extra credit assignment. "

"The plans for many important buildings were once publicly available."

"Let me tell you how it happened."

"This invalid contract cannot be legally enforced."

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

"My parents are legally obligated to provide for my needs until I turn eighteen. "

"The checkmate was imminent; the king was in check. "

"This manuscript is the original."

"We went out for a picnic in the forest."

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

"The school's announcement of the cancellation of the field trip disappointed the students. "

"Marriage is a contract."