Mrs． Luo is a teacher from Shaoyang． She asked her students to hand in their homework through a QR code（二维码）． "（1）When students finish the homework，they keep it on Wechat． So I can check their homework everywhere using my computer or mobile phone．" said Luo．

    （2）大多数学生喜欢这种新方式，认为它有趣． "We are living in the information age． Many students like to work with computers， which makes learning more fun．" said Tingting， a student of Luo's．

    "The paper is not easy to keep， but the code is easy to keep and share，" Luo said， "It is worth trying to use new technology in education． Education itself is a kind of creation．（3）I don't want my students to fall behind the times．"

    （4）然而，一些父母有担忧． They are afraid that their children will spend too much time on computers and less time communicating with teachers． But in fact， it is 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． （5）As for teachers，it allows them to check the students' work at any time． And it is also an easy way to share homework with other students．

（1）　　

（2）　　

（3）　　

（4）　　

（5）