Mr.Guo is a teacher from Xi'an.He asked his students to hand in their homework through a QR code（二維碼）. "We spent an hour or two in class learning how to generate（使產(chǎn)生）the codes，and in the end everything gets easier，" said Guo. "When students finish the homework，they keep it on WeChat（微信）.Then，each student makes his own QR code and gives it to me.So，I can check their work everywhere using my computer or telephone" .
   Guo's students like the new way and think it is interesting. "We are living in the information age. Many students like to work with computers，which makes learning more fun." said Tingting，a student of Guo's.
   However，some parents are worried.They are afraid that their children will spend too much time on computers and less time communicating with teachers.But in fact，it's unnecessary.Students still need to look up information in books and write it down when they do their homework.They only use the code when they hand in their work，which doesn't take them too much time.Also for teachers，it allows them to check the students' work at any time.And it's also an easy way to share homework with other students.

（1）What do Mr.Guo's students think of the new way of handing in their homework ？

B

B

A．They think it's boring .
B．They think it's interesting .
C．They think it's difficult .
D．They think it's unnecessary.
D．the age which students don't have information
（2）Some parents are worried，because they think their children will

D

D

.
A．talk with their teacher face to face
B．find the QR codes too difficult to use
C．hate the new way of handing in homework
D．spend too much time on computers or phones
（3）What's the main idea of the passage？

C

C

A．Some parents are worried about their children.
B．Teachers don't need to check homework any more.
C．Using QR codes makes checking homework easier.
D．Students don't need to hand in homework any more.