UNIT 4. BROADEN YOUR MIND! » Стр.209 (4)

1. Have many schools been constructed this year? Many schools have not been constructed this year. 2. Has the new project been finished yet? The new project has not been finished yet. 3. Has our library been turned into a shopping center? Our library has not been turned into a shopping center. 4. Has the problem been discussed yet? The problem has not been discussed yet. 5. Have the letters been posted? The letters have not been posted.