.The teacher had the students __________ all the words they didn’t know.
—May I ask a question after class, Sir?— __________, but not during my lunch break.
Many people have fully realized it's important to keep __________ balance of __________ nature. Otherwise, humans will be punished by it.
He lost his __________ and fell off his bicycle.
—Do you need any help, Lucy?—Yes. The job is __________ I could do myself.
Mr. Black is very happy because the clothes made in his factory have never been __________.