Rewrite the sentences. Use: could, should, can/can't, mustn't or didn't have to.

1 It's forbidden to park your car here.

2 It wasn't necessary for Jo to make

a donation.

3 It's impossible for Alan to get

unemployment benefits.

4 Is it OK if I borrow your car?

5 John had the ability to write when

he was three years old.

6 It's a good idea to hold a

fundraiser.

1.The reason why the law of demand works is(to be,Present Simple)quite obvious: the money we have(to have,Present Simple) is(to be,Present Simple) limited.
Причина по которой закон спроса работает очевидна:наши деньги ограничены.
2.Modern economics was(to be,Past Simple) really born in the 19th century.
Современная экономика действительно была рождена в 19 веке.
3.Smith and other classical economists were(to be,Past Continuos) writing at a time of great change.
Смит и другие классические экономисты писали во время большой перемены.
4.Most rules have(to have,Present Simple) exceptions, but economists agree that there are(to be,Оборот There are) very few exceptions to the law of demand.
Большинство правил имеют исключения,но экономисты соглашаются,что очень мало исключений в законе спроса.
5.Companies have(to have,have to-модальный глагол)to compete with each other for a share of the market.
Компании должны конкурировать друг с другом для разделения рынка.

The way we look means much in our lives. People usually judge us by1appearances2. So it takes much time to look well. So there are a lot of medical services3 which help keep beauty. The variety of cosmetics is great. And so it is important to know how you should describe  appearances. I’d like to tell you some words about me.I am 30,but everyone says that I don’t look my age 4. I  take much care over my appearance5 and I have aged quite well6. I am of medium height and built7. I do a lot of sport and so I look slim. My hair is wavy and blond. My nose is straight and eyes are blue. My ears are not big, the face is oval. What I don’t like in myself  is freckles8. They always come in spring. My friends sometimes call me a «typical blonde». I should admit that this style is close to me9.I take after10 my granny. She looked just like me when she was young. I prefer dresses, skirts and romantic style. I try always to be well dressed11.To tell the truth12 I devote much time for my appearance and spend much money for it.I’d like to add some words about my character. I am even-tempered13, rather reserved14,calm and moderst. Sometimes I can lose my temper15 and become either angry or sad. At these moments I like staying alone and sometimes I retire into my shell16. But I have a lot of friends. I am opened for everything new, appreciate people for17 honesty and justice. I like to laugh and to joke. I have a good sense of humour.But remember that appearances can be deceptive18. And you mustn’t judge people by the first impression19.