Ответ:
1) Car designers have to design modern cars, but they don’t have to test them. I think, car designers must be clever and they must like driving cars. 2) A nanny has to work with children. She must get on well with them. Besides, she must be trustworthy and kind. 3) A lawyer has to know all the laws. But he/she has to keep the law and order in his/her job. Lawyers must be trustworthy professionals. 4) A librarian has to meet a lot of people during the day. A good librarian has to be ready to advise people about books/what book to choose. But a librarian does not have to read all the books in the library she/he works in. 5) A businessman has to make his business plan and organise other people to realize this plan. A business person must be trustworthy. 6) A housewife has to do a lot about the house. She has to look after her family. She doesn’t need to go to work but what she does is a hard job. 7) A secretary has to help her boss to plan his time and to answer the telephone. Sometimes she has to prepare tea or coffee. But she doesn’t have to tidy up the office where she works. A good secretary must use the computer very well. 8) A musician has to play a musical instrument very well. Musicians must be both talented and hard-working. 9) A cook has to prepare meals. A good cook has to know a lot of recipes. He must be very careful and he must/has to know what food to choose.