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16. According to the passage, Guo’s students can keep their homework on WeChat, can’t they? _____________________________________________________________________________ 17. How can the QR codes be sent to Mr. Guo? _____________________________________________________________________________ 18. What is one of the advantages of the new way of handing in homework? _______________________________________________________________________________ 19. What do some parents worry about? __________________________________________________________________________________ 20. What do you think of the new way of handing in homework? __________________________________________________________________________________ (责任编辑：admin) |