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Your body prevents harmful microorganisms entering and causing harm. The
skin, for example, doesn't allow microorganisms to enter. Hairs and mucus in your nose catch invaders, and then you push themucus out when you cough, sneeze or blow your nose. Enzymes and acids in the body, and white blood cells also destroy bacteria.
Do antibiotics help ? Doctors use antibiotic drugs to fight bacterial infections, but antibiotics don't work
against viruses. This is why doctors don't give antibiotics to patients with a
common cold or flu.
How does immunization work ? Immunization
(or vaccination) is another way of protecting the body, by injecting the body with
dead or inactive microorganisms. After vaccination, the body starts to
make antibodies that destroy the microorganism. Because the microorganisms in the
vaccination are not dangerous, the person doesn't getill. When they come
into contact with a live (dangerous) micro organism, then the antibodies
destroy the infection before it makes them ill.
Exercise: Read the texts and answer the following questions:
Mary' hobby
My hobby is making paper dolls. The paper dolls are always drawn on cardboard and cut out. I also design some beautiful clothes fir my paper dolls. I usually draw clothes on paper, cut them out and put them on the dolls. I often do this on Sundays. £ enjoy making paper dolls because I like drawing and designing. When I design clothes, I sometimes learn about the clothes that people of other countries wear. I hace made paper dolls for one year. Now I have got over thirty dolls and more than a hundred sets of beautiful clothes.
Sam's hobby.
Sam has got a lot of hobbies and interests. He usually runs every morning. He occasionally goes skiing on Saturdays during the winter. He often rides a horse at a stable near his home on Sumdays. He is never late. He loves listening to music. He always goes to choir practice on Wednesday evenings and sometimes sings in the church on Sundays. He doesn't have much money, so he rarely goes to concerts in the city . He seldom watches TV at weekends because he likes doing things outside. He usually goes to the gym if it rains outside. He often hangs out with his best friends but he never goes shopping.
1.Why does Mary have this hobby?
-Because she likes drawing and designing.
2.How many dolls and sets of clothes has she got?
--She has got over thirty dolls and more than a hundred sets of beautiful clothes.
3.What are Sam's hobbies?
-Sam's hobbies are running, go skiing, riding a horse,listening to music,and so on.
4.What does he do for his hobby of music?
-He always goes to choir practice on Wednesday evenings and sometimes sings in the church on Sundays.
5.Does he love watching TV? Why?
-Because he likes doing things outside.
6.Do Mary and Sam have the same hobbies?Why?
-No,they don't.Because
1. I used to play football when I was a child.
2. John didn't use to smoke before he went to work.
3. There used to be five lakes in my village, but now there is only one.
4. Minh used to like eating junk food, but now he eats healthy food.
5. She didn't use to cook before she get married, but now she cooks every evening.
6. Alex didn't use to have a mobile phone, but now he uses his mobile phone very often.
7. When I was single, I used to go shopping every weekend, but now I wants to go out with my husband.
8. Did your father used to go late when he worked for Apple company? ~ Yes, he did.
Look out for yourself and your friends when out ..on.. foot and bike.
Chúc bạn học tốt!
Look out for yourself and your friends when out ..on. foot and bike.
Chúc bạn học tốt!