Замените сослагательное наклонение в форме Indefinite на перфектную форму.
Образец: The question might be asked – The question might have been asked. Этот вопрос могли бы задать (но не задали)
1. The agreement might be signed. 2. It would be impossible to do this work. 3. Such an action could lead to disagreement. 4. We might solve the problem properly. 5. They would agree with our proposition. 6. The process would not take place. 7. He might not be invited to the conference. 8. It would take much time to make such calculations.

The agreement might have been signed. 2. It would have been impossible to do this work. 3. Such an action could have led to disagreement. 4. We might have solved the problem properly. 5. They would have agreed with our proposition. 6. The process would not have taken place. 7. He might not have been invited to the conference. 8. It would have taken much time to make such calculations.