I. Определите, чем выражено каждое сказуемое (время, группа и залог глагола).

I. Обусловьте, чем выражено каждое сказуемое (время, группа и залог глагола).
1. The students had completed the test before we returned.
2. The international exchange programs will be developed still further in future.
3. Much attention is being paid to the development of three-dimensional television.