The school rule states that no child shall be，unless________by an adult，allowed out of the school during the day.

I don’t think it easy, even if we work hard,           the South Korea and the North Korea to sit down to talk at present.

They are broading the bridge to _____the flow of traffic.

_______ from the top of the hill, the city is of round shape with a flowing river through it.

I expect them _______ and I wish all the rooms _____________.