Computer is important in the world. It is because it has many uses	Computer is important in the world. It is because it has many uses	
In past a few people had mobile phone but now everyone has.	In past a few people had mobile phone but now everyone has.	
It make our lives more convenience.	It make our lives more convenience.	
I can get many informations from computer.	I can get many informations from computer.	
Computer has been changing our lives.	Computer has been changing our lives.	
It makes us easier to solve the problem.	It makes us easier to solve the problem.	
Computer make people possible to communicate with each others.	Computer make people possible to communicate with each others.	
We can communicate even we are travelling.	We can communicate even we are travelling.	
Mobile phone omit radiation.	Mobile phone omit radiation.	
You can correct your errors and no need to rewrite.	You can correct your errors and no need to rewrite.	
Mobile phones are the important invention in the world.	Mobile phones are the important invention in the world.	
In the past we should use public phone but now we can use our mobile phone.	In the past we should use public phone but now we can use our mobile phone.	
It become the common product in the world.	It become the common product in the world.	
If no mobile phone, I could not call my family when I am out.	If no mobile phone, I could not call my family when I am out.	
Almost every people have mobile phone.	Almost every people have mobile phone.	
You can communicate in anywhere no matter you are shopping or on the beach.	You can communicate in anywhere no matter you are shopping or on the beach.	

Answers	
Computers are important around / all over the world because they have many uses	
In the past few people had mobile phones but now everyone has one / them.	
They are very convenient.	
I can get a lot of information from my / the computer.	
Computers have changed our lives.	
They make it easier for us to solve problems.	
Computers make it possible for people to communicate with each other.	
We can communicate even when we are travelling.	
Mobile phones emit radiation.	
You can correct your errors and you don’t need to rewrite your work.	
Mobile phones are the most important invention in the world.	
In the past we had to use public phones but now we can use our mobile phones.	
They have become common around / all over the world.	
If there were no mobile phones, I could not call my family when I am out.	
Almost everyone has a mobile phone.	
You can communicate anywhere no matter whether you are shopping or on the beach.