1.he (have waited\ have been waiting) for a reply several weeks and steal (have not received\ havent been receiving\ have received) any answer. 2.Galileo is supposed ( have invited \ having invented\ to invent\ to have invented) the telescope
3. it ( ought\ may/ will have to\ will ba able to) be cold tommorow
1. He has been waiting for a reply several weeks and still has not received any answer.
2. Galileo is supposed to have invented
3. It may be cold tomorrow