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At computer class, young girl student sits with mobile phone and listens admiringly to teacher

Фото1,00 $At computer class, young girl student sits with mobile phone and listens admiringly to teacher

During computer courses, male teacher with mobile phone explains to listeners principle of operation

Фото1,00 $During computer courses, male teacher with mobile phone explains to listeners principle of operation

Young male speaker holds mobile phone in hands and explains to listeners of computer courses

Фото1,00 $Young male speaker holds mobile phone in hands and explains to listeners of computer courses