VI/
1. You don't have to do the test.
2. You mustn't tell anyone about our plans.
VII/
1. You must know Spanish to get this job.
2. That old typewriter needs to be repaired.
3. You should not call the doctor at once.
VIII/
1. Women's average salary to that of men should be increased by employers. 
2. The girl's strength and intelligence oughtn't to be looked down on by the boys in my class.
3. The contest may be held next week.
4. A lot of hard work can be done to earn much money for her family by her.
5. Could the rules to protect girl students from gender discrimination be brought in?

IX/
1. This work can be done by Tom tomorrow.
2. Homeless people sould be provided with food by the government.
3. The festival may not be held in the city due to the infectious disease.
4. Could the painting be taken to the gallery by her yesterday?
5. The exhibits in the museum mustn't be touched by visitors.
XIII/
1. Should Anna be helped with her work by her?
2. The whole village can be seen from their flat on the 10th floor.
3. Assignments must be written in ink.
4. The test can't be finished in 15 minutes by you.
5. Lessons need to be prepared by students before going to bed.