Раскройте скобки, поставьте глаголы в нужные формы страдательного залога. Переведите предложения: 1. We (to inform) about it by 10 a.m. tomorrow. 2. New methods of buildings (to develop) by engineers now. 3. This letter (to leave) unanswered last week.4. This book already (to return) to the library by me. 5. This paper (to receive) by 11 a.m. yesterday. 6. Letters (not to type) on bad paper.

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