challenged

"The words “big” and “heavy” are English adjectives."

"My friend told me there was something in the box, but I didn't know what it was yet. "

"The competition for this job is strong."

"The student argued politically for a longer lunch break during the school meeting. "

"The ladder leaned vertically against the wall. "

"The application required a countersign from the department head to validate the principal's signature. "

"He completed the assignment on time."

""Where they burn books, they will also burn people" is a famous quotation from Heinrich Heine."

"The teacher threw a challenge to the students: "Who can solve this difficult math problem?" "

"My objection to the noisy party is that it disturbs the neighbours. "

"Previously, I had planned to study for the math test on Saturday. "

"My teacher made a statement about the importance of studying hard. "