belive
beliEve
You get so bored.
'So' is too informal and 'you' is too personal.
It has helped us many times.
It has helped us A LOT/ ENORMOUSLY/ TREMENDOUSLY, etc.
know other cultures
learn about other cultures
do friends
make friends
moviles
mobiles
Others think is a waste of time.
Others think IT is a waste of time.
You can speak to friends, look at photos of friends and make friends.
You can speak to friends, look at THEIR photos and make NEW ONES.
Technology only has affected us...
Technology has ONLY affected us...
differents aspects
We don't pluralise adjectives in English.
My favourites books.
My favourite books.
It makes easier to understand.
It makes IT easier to understand.
search information
search FOR information
it'll don't aren't hasn't, etc.
NO CONTRACTIONS!
I'm going to talk about technology.
I know you are. I set the homework, remember?
Technology made a positive contribution to society.
Technology HAS made a positive contribution to society.
Other thing is that...
Another thing is that...