Jawaban:

1.the door can't be opened by mark because he hasn't the key

2some photos will be taken by mary if the weather is fine

3computers are not used nowadays by many children but they use smartphone

4lots of questions were being asked by the police in the neighbourhood

5a difficult test is being given by the teacher

6his homework has not been done by peter

7the children may not be taken by mother to the party

8a swimming pool had been built by people when the old one was broken last year

9the telephone was invented by bell in 1876

10the visitors were not be taken by someone to the airport

11polluted

12is measured

13is discarded

14were poisoned

15are washed