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mobile phones ,keeping fit

mobile phones entered our life not long ago, but today we can’t imagine our life without them. some doctors say that they are very harmful to the health, especially to the health of children.

the mobile phones emit electromagnetic radiation, and a number of different scientific institutes claim that this radiation is really very harmful, though still there is no hard evidence that showed that mobile phones caused harm in real humans. i try to talk over my mobile phone as less as possibleto avoid the health risks.

1 - c2 - a3 - f4 - e5 - b

6 - d 

My school life is wonderful. there are three floors in my school and many new classrooms. there are a lot of computers which we can use. my dream is every classroom has ten and more new computers with internet.  there are lots of concerts, performances and sport competitions in our school. my classmates and i often take part in different school events. i have a lot of friends in my class.   our teachers are kind and intelligent and my classmates are smart and friendly. i like my school very much.

.1.-open the window.

-but i have opened the window.

2.i have seen the film.

3.he has opened the door.

4.they have cleaned the room.