What do people have/do not have to do in their jobs?

What do people have/do not have to do in their jobs? What must/must not they do?
1. nbsp;Car designers________design modern cars but they________
test them. I think, car designers ________be clever and they
nbsp;__ like driving cars.
2. nbsp;A nanny_______work with children. She _______ get on well
with them. Besides, she________be trustworthy and kind.
3. nbsp;A lawyer________ know all the laws. But he/she________keep
the law and order in his/her job. Lawyers________be trustworthy
professionals.
4. nbsp;A librarian________ meet a lot of people during the day. A good
librarian _________ be ready to advise people what book to choose.
But a librarian _________ read all the books in the library she/he
works in.
5. nbsp;A businessman __________ make his business plan and organise
other people to realize this plan. A business person __________ be
trustworthy.
6. nbsp;A housewife________do a lot about the house. She________look
after her family. She does not need to go to work but what she does is a hard job.
7. nbsp;A secretary_________ help her boss to plan his time and to answer the telephone. Sometimes she _________ prepare tea or coffee.
But she_________ tidy up the office where she works. A good secretary _________use a computer very well.
8. nbsp;nbsp;A musician___________play a musical instrument very well.
Musicians _________ be both talented and hard-working.
9. nbsp;A cook _________ prepare meals. A good cook _________ know a
lot of recipes. He ________be very careful and he________ know
what food to choose