How long do you usually spending on using mobile phone ?
A .0-1 h
B.1-2h
C.2-3h
D. =3h
What do you usually do on using mobile phone ？
A.Playing games
B.Calling
C.Studying
D.Using qq or Weixin
E. Reading E-book
F.whatching movies
G.Reading news
H.Listening to music
How much time do you usually spend on using mobile phone in a class ?
A. 0-10 min
B. 10-20min
C.20-30min
D.30-60min
E.More than 1 h
Do you often using mobile phone while walking？
Do you turn off your mobile phone when you are sleeping?
Do you often using mobile phone while eating？
Do you often study English on mobile phone？