Both parents and teenagers should try their best to communicate more with each other and the gap(差距) between them.[ ]

________, more than 200 houses and buildings are heated by solar energy, not to mention the big cities

Europeans made ______ clear that they did not want to take the Romans as neighbors.

Many of them turned a deaf ear to her advice, _______ they knew it to be valuable

I have not finished with my dinner yet.—But our friends ______ for us