Ex 7 at page 15 work Book. Are the sentences True or False and correct the
sentences ?
Oso
1 Read the text again and write True or False for sentences 1-6. Correct the false sentences
.
1 We usually change the raw materials before we use them
2 Iron ore is a rock with metal in it
3 The furnace doesn't need to be very hot
4 There are three ovens in this process
5 Iron is stronger than steel
6 We use moulds to make the shapes weneed​

Lisa is a wonderful and smart dog; it is small and black. My dog has long ears but has no tail at all. Lisa is two years old, it knows many commands: Come! Sit! Stay! Down! No! Drop it! Wait! It is a very clever and lovely doggie with black kind eyes. 

Lisa and I like to spend time together. When I come home from school she runs to greet me. It is so pleasant! 

Lisa is a hunting dog. That is why it does not like cats. When Lisa sees a cat it begins to bark as a mad dog and tries to bite a cat. But one day Lisa helped a kitten. 

Lisa and I were walking in the yard. It was a nice spring day. My dog was very active that day. It ran, jumped and even danced. I was sitting and reading a book about Harry Potter. But suddenly Jessie ran fast to the big tube at the end of the yard. It was a huge tube, walking near that tube was dangerous because it could break into pieces. Lisa was barking and barking all that time and I ran after my dog to look what was there. Only then I saw a little kitten in the hole of the tube. The kitten could not get out of the hole without anybody’s help; it had crack-up. I could not look at the kitten without tears; it was difficult and dangerous but I helped the kitten to get out of the tube. 

Now this kitten is a young and strong cat; it lives with my elder sister. She has her own family and lives not far from our parents’ house. So Lisa saved the cat and I am proud of my dog! 

Sometimes brings me slippers, sometimes Lisa tears them. I never get angry with it because I can buy new slippers but new Lisa I will not buy for all money of the world. 

A и an всегда ставятся перед существительными в единственном числе!
a перед существительным, начинающимся с гласного a car
an перед существительным, начинающимся с согласного an apple

1. если предмет упоминается в первый раз. A boy came into the room. Какой-то мальчик (мы не знаем какой) вошел в комнату. 
2.в сочетание прилагательное +существительное a funny man
3. если существительное в обобщающем значении a cow gives milk. корова (любая!!) дает молоко
4.в значении "один" I wait you for an hour! 1 час .
5. в таких выражениях he is a doctor перед названием профессии