B. In Viet Nam, we can use a bank card to pay for most our activities such as travelling on the bus or going shopping. - 1, C. This make the payment much easier and more convenient than paying bay cash. - 2, A. I also hope our city will have a smart bike-sharing system soon. - 3, E. People will not have to use their own vehicles for short distances. - 4, D. Thus, this will reduce traffic jams an pollution in our city. - 5,

Unit3-Lesson7: Discussion

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