1. The secretary is typing a letter.
2. Susan and her brother are taking photos
3. Students are discussing the environmental problem now.
4. They are building a new ring-road round the city.
5. Our school is organizing a contest
6. John is photocopying the document​

1. A letter is being written by the  secretary.

2. Photos are being taken by Susan and her brother.

3. The environmental problem is being discussed now by students.

4. A new ring-road is being built round the city by them.

5. A contest is being organized by our school.

6. The document is being photocopied by John.

Объяснение:

1. A letter is being typed by the secretary.

2. Photos are being taken by Susan and her brother.

3. The environmental problem is being discussed by students now.

4. A new ring-road is being built round the city.

5. A contest is being organized by our school.

6. The document is being photocopied by John.

Объяснение:

the Present Continuous Passive:

am/is/are + being + v3

V3 = третья форма глагола