We are confident that the environmenr byour further efforts to reduce pollution

_______ busy schoolwork, the children also have to take arts, music and sports classes in their free time.-I wonder what they will become.[ ]

We prefer at the party rather than_____.

Jerry promised that he would be back ____ 2 o’clock while Rodman promised that he would turn up ____ 2 hours[ ]

His uncle is a worker and has been working in the factory for more than ten years. _____.