Ex.1
1. A scientific conference is being hold in the hall.
2. A lecture is being delivered in the classroom.
3. A child is being examined in the surgery.
4. A film is being watched in the sitting room.
5. Dinner is being cooked in the kitchen.
Ex.2
1. No,the article has already been translated by me.
2. No, the new play has already been discussed by us.
3. No, the ground floor has already been built by them.
4. No, the letters have already been typed by the secretary.
5. No, the parcel has already been packed by her.
Ex.3
1. This article can be easily translated.
2. It must be done at once.
3. The poem was was to be learnt by heart.
4. The day of the meeting may be changed.
5. The rules should be learnt.
6. Their visit had to be postponed.