Заслуга 30 баллов. What do people have/do not have to do

Заслуга 30 баллов. What do people have/do not have to do in their jobs? What must/must not they do?
1. Car designers _____ desigh modern cars but they ______ test them. I think, car designers _____ be clever and they ______ like driving cars.
2. A nanny ______ work with children. She ________ get on well with them. Besides, she _____ be trustworthy and kind.
3. A lawyer _______ know all the laws. But he/she ______ keep the law and order in his/her job. Lawyers ______ be trustworthy professionals.
4. A librarian ____ meet a lot of people during the day. A good librarian ______ read all the books in the library she/he works in.
5. A businessman ______ make his business plan and organise other people to realize this plan. A business person ____ be trustworthy.
6. A houswife _____ do a lot about the house. She ______ look after her family. She does not need to go to wotk but what she does is a hard job.
7. 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. A musician _____ play a musical instrument very well. Musicians ______ be both talented and hard-working.
9. A cook ____ prepare meals. A good cook ______ know a lot recipes. He _____ be very careful and he _____ know what food to choose.