Students should be __________ in class.Only listening without taking part in the activities is not good for one’s study.[ ]

We advise parents ______their children at home alone in order to keep them away from danger .

He _______ himself ______ Mr. Gray in the company.[ ]

Will you please tell her about the news —Sure, I’ll tell her about it as soon as she __________ back.

Tim, drink your milk and set a good example ______ the other children!