my research topic..

it's a hard work.. well.i probably choose a topic is about cellphone. that is the genera field. and i am think 3 ideas are about the cellphone's history, cellphone service industry and how the cellphone makes change in our life and work.
until to now, i just think out 4 questions"
1. what are the factors to cause the people invent cellphone?
2. how did the cellphone develop?
3. did the cellphone development's speed as fast as the computer development's speed?
4. how did the cellphone economic effect the national industry?

for our A2 classmates

3true, 1false

1.I like any kind of consumer electronics.
2.I know many kinds of cars very well.
3.I like to play soccer.
4.I love Sony products very much.